PDF Export in Blazor TreeGrid Component

17 Dec 202224 minutes to read

PDF export allows exporting Tree Grid data to PDF document. You need to use the
PdfExport method for exporting. To enable PDF export in the Tree Grid, set the AllowPdfExport as true.

To know about exporting tree grid data to PDF document in Blazor tree grid component, you can check on this video.

RAZOR
C#
@using TreeGridComponent.Data;
@using Syncfusion.Blazor.TreeGrid;

<SfTreeGrid @ref="TreeGrid" DataSource="@TreeGridData" AllowPdfExport="true" IdMapping="TaskId" ParentIdMapping="ParentId" TreeColumnIndex="1"
             Toolbar="@(new List<string>() { "PdfExport" })">
    <TreeGridEvents OnToolbarClick="ToolbarClickHandler" TValue="TreeData"></TreeGridEvents>
    <TreeGridColumns>
        <TreeGridColumn Field="TaskId" HeaderText="Task ID" Width="80" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="TaskName" HeaderText="Task Name" Width="160"></TreeGridColumn>
        <TreeGridColumn Field="Duration" HeaderText="Duration" Width="100" Format="C2" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="StartDate" HeaderText=" Start Date" Format="yMd" Type="Syncfusion.Blazor.Grids.ColumnType.Date" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right" Width="100"></TreeGridColumn>
        <TreeGridColumn Field="Priority" HeaderText="Priority" Width="80"></TreeGridColumn>
    </TreeGridColumns>
</SfTreeGrid>

@code{
    SfTreeGrid<TreeData> TreeGrid;

    public List<TreeData> TreeGridData { get; set; }

    protected override void OnInitialized()
    {
        this.TreeGridData = TreeData.GetSelfDataSource().ToList();
    }

    private void ToolbarClickHandler(Syncfusion.Blazor.Navigations.ClickEventArgs Args)
    {
        if(Args.Item.Text == "PDF Export")
        {
            this.TreeGrid.PdfExport();
        }
    }
}
namespace TreeGridComponent.Data {

public class TreeData
    {
       
            public int TaskId { get; set;}
            public string TaskName { get; set;}
            public int? Duration { get; set;}
            public int? Progress { get; set;}
            public string Priority { get; set;}
            public int? ParentId { get; set;}
      
        public static List<TreeData> GetSelfDataSource()
        {
            List<TreeData> BusinessObjectCollection = new List<TreeData>();
            BusinessObjectCollection.Add(new TreeData() { TaskId = 1,TaskName = "Parent Task 1",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 2,TaskName = "Child task 1",Progress = 80,Priority = "Low",ParentId = 1 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 3,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Critical",ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 4,TaskName = "Child task 3",Duration = 6,Priority = "High",Progress = 77,ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 5,TaskName = "Parent Task 2",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 6,TaskName = "Child task 1",Duration = 4,Progress = 80,Priority = "Critical",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 7,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Low",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 8,TaskName = "Child task 3",Duration = 6,Progress = 77,Priority = "High",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 9,TaskName = "Child task 4",Duration = 6,Progress = 77,Priority = "Low",ParentId = 5});
            return BusinessObjectCollection;
        }
    }
}

To customize PDF export

PDF export provides an option to customize mapping of Tree Grid to exported PDF document.

File name for exported document

The file name can be assigned for the exported document by defining fileName property in PdfExportProperties.

RAZOR
C#
@using TreeGridComponent.Data;
@using Syncfusion.Blazor.TreeGrid;

<SfTreeGrid @ref="TreeGrid" DataSource="@TreeGridData" AllowPdfExport="true" IdMapping="TaskId" ParentIdMapping="ParentId" TreeColumnIndex="1"
             Toolbar="@(new List<string>() { "PdfExport" })">
    <TreeGridEvents OnToolbarClick="ToolbarClickHandler" TValue="TreeData"></TreeGridEvents>
    <TreeGridColumns>
        <TreeGridColumn Field="TaskId" HeaderText="Task ID" Width="80" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="TaskName" HeaderText="Task Name" Width="160"></TreeGridColumn>
        <TreeGridColumn Field="Duration" HeaderText="Duration" Width="100" Format="C2" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="StartDate" HeaderText=" Start Date" Format="yMd" Type="Syncfusion.Blazor.Grids.ColumnType.Date" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right" Width="100"></TreeGridColumn>
        <TreeGridColumn Field="Priority" HeaderText="Priority" Width="80"></TreeGridColumn>
    </TreeGridColumns>
</SfTreeGrid>

@code{
    SfTreeGrid<TreeData> TreeGrid;

    public List<TreeData> TreeGridData { get; set; }

    protected override void OnInitialized()
    {
        this.TreeGridData = TreeData.GetSelfDataSource().ToList();
    }

    private void ToolbarClickHandler(Syncfusion.Blazor.Navigations.ClickEventArgs Args)
    {
        if (Args.Item.Text == "PDF Export")
        {
            Syncfusion.Blazor.Grids.PdfExportProperties ExportProperties = new Syncfusion.Blazor.Grids.PdfExportProperties();
            ExportProperties.FileName = "test.pdf";
            this.TreeGrid.PdfExport(ExportProperties);
        }
    }
}
namespace TreeGridComponent.Data {

public class TreeData
    {
       
            public int TaskId { get; set;}
            public string TaskName { get; set;}
            public int? Duration { get; set;}
            public int? Progress { get; set;}
            public string Priority { get; set;}
            public int? ParentId { get; set;}
      
        public static List<TreeData> GetSelfDataSource()
        {
            List<TreeData> BusinessObjectCollection = new List<TreeData>();
            BusinessObjectCollection.Add(new TreeData() { TaskId = 1,TaskName = "Parent Task 1",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 2,TaskName = "Child task 1",Progress = 80,Priority = "Low",ParentId = 1 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 3,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Critical",ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 4,TaskName = "Child task 3",Duration = 6,Priority = "High",Progress = 77,ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 5,TaskName = "Parent Task 2",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 6,TaskName = "Child task 1",Duration = 4,Progress = 80,Priority = "Critical",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 7,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Low",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 8,TaskName = "Child task 3",Duration = 6,Progress = 77,Priority = "High",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 9,TaskName = "Child task 4",Duration = 6,Progress = 77,Priority = "Low",ParentId = 5});
            return BusinessObjectCollection;
        }
    }
}

How to change page orientation

Page orientation can be changed Landscape(Default Portrait) for the exported document using the export properties.

RAZOR
C#
@using TreeGridComponent.Data;
@using Syncfusion.Blazor.TreeGrid;

<SfTreeGrid @ref="TreeGrid" DataSource="@TreeGridData" AllowPdfExport="true" IdMapping="TaskId" ParentIdMapping="ParentId" TreeColumnIndex="1"
             Toolbar="@(new List<string>() { "PdfExport" })">
    <TreeGridEvents OnToolbarClick="ToolbarClickHandler" TValue="TreeData"></TreeGridEvents>
    <TreeGridColumns>
        <TreeGridColumn Field="TaskId" HeaderText="Task ID" Width="80" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="TaskName" HeaderText="Task Name" Width="160"></TreeGridColumn>
        <TreeGridColumn Field="Duration" HeaderText="Duration" Width="100" Format="C2" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="StartDate" HeaderText=" Start Date" Format="yMd" Type="Syncfusion.Blazor.Grids.ColumnType.Date" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right" Width="100"></TreeGridColumn>
        <TreeGridColumn Field="Priority" HeaderText="Priority" Width="80"></TreeGridColumn>
    </TreeGridColumns>
</SfTreeGrid>

@code{
    SfTreeGrid<TreeData> TreeGrid;

    public List<TreeData> TreeGridData { get; set; }

    protected override void OnInitialized()
    {
        this.TreeGridData = TreeData.GetSelfDataSource().ToList();
    }

    private void ToolbarClickHandler(Syncfusion.Blazor.Navigations.ClickEventArgs Args)
    {
        if(Args.Item.Text == "PDF Export")
        {
            Syncfusion.Blazor.Grids.PdfExportProperties ExportProperties = new Syncfusion.Blazor.Grids.PdfExportProperties();
            ExportProperties.PageOrientation = Syncfusion.Blazor.Grids.PageOrientation.Landscape;
            this.TreeGrid.PdfExport(ExportProperties);
        }
    }
}
namespace TreeGridComponent.Data {

public class TreeData
    {
       
            public int TaskId { get; set;}
            public string TaskName { get; set;}
            public int? Duration { get; set;}
            public int? Progress { get; set;}
            public string Priority { get; set;}
            public int? ParentId { get; set;}
      
        public static List<TreeData> GetSelfDataSource()
        {
            List<TreeData> BusinessObjectCollection = new List<TreeData>();
            BusinessObjectCollection.Add(new TreeData() { TaskId = 1,TaskName = "Parent Task 1",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 2,TaskName = "Child task 1",Progress = 80,Priority = "Low",ParentId = 1 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 3,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Critical",ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 4,TaskName = "Child task 3",Duration = 6,Priority = "High",Progress = 77,ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 5,TaskName = "Parent Task 2",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 6,TaskName = "Child task 1",Duration = 4,Progress = 80,Priority = "Critical",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 7,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Low",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 8,TaskName = "Child task 3",Duration = 6,Progress = 77,Priority = "High",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 9,TaskName = "Child task 4",Duration = 6,Progress = 77,Priority = "Low",ParentId = 5});
            return BusinessObjectCollection;
        }
    }
}

How to change page size

Page size can be customized for the exported document using the export properties.

Supported page sizes are:

Letter
Note
Legal
A0
A1
A2
A3
A5
A6
A7
A8
A9
B0
B1
B2
B3
B4
B5
Archa
Archb
Archc
Archd
Arche
Flsa
HalfLetter
Letter11x17
Ledger

RAZOR
C#
@using TreeGridComponent.Data;
@using Syncfusion.Blazor.TreeGrid;

<SfTreeGrid @ref="TreeGrid" DataSource="@TreeGridData" AllowPdfExport="true" IdMapping="TaskId" ParentIdMapping="ParentId" TreeColumnIndex="1"
             Toolbar="@(new List<string>() { "PdfExport" })">
    <TreeGridEvents OnToolbarClick="ToolbarClickHandler" TValue="TreeData"></TreeGridEvents>
    <TreeGridColumns>
        <TreeGridColumn Field="TaskId" HeaderText="Task ID" Width="80" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="TaskName" HeaderText="Task Name" Width="160"></TreeGridColumn>
        <TreeGridColumn Field="Duration" HeaderText="Duration" Width="100" Format="C2" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="StartDate" HeaderText=" Start Date" Format="yMd" Type="Syncfusion.Blazor.Grids.ColumnType.Date" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right" Width="100"></TreeGridColumn>
        <TreeGridColumn Field="Priority" HeaderText="Priority" Width="80"></TreeGridColumn>
    </TreeGridColumns>
</SfTreeGrid>

@code{
    SfTreeGrid<TreeData> TreeGrid;

    public List<TreeData> TreeGridData { get; set; }

    protected override void OnInitialized()
    {
        this.TreeGridData = TreeData.GetSelfDataSource().ToList();
    }

    private void ToolbarClickHandler(Syncfusion.Blazor.Navigations.ClickEventArgs Args)
    {
        if(Args.Item.Text == "PDF Export")
        {
            Syncfusion.Blazor.Grids.PdfExportProperties ExportProperties = new Syncfusion.Blazor.Grids.PdfExportProperties();
            ExportProperties.PageSize = Syncfusion.Blazor.Grids.PdfPageSize.Letter;
            this.TreeGrid.PdfExport(ExportProperties);
        }
    }
}
namespace TreeGridComponent.Data {

public class TreeData
    {
       
            public int TaskId { get; set;}
            public string TaskName { get; set;}
            public int? Duration { get; set;}
            public int? Progress { get; set;}
            public string Priority { get; set;}
            public int? ParentId { get; set;}
      
        public static List<TreeData> GetSelfDataSource()
        {
            List<TreeData> BusinessObjectCollection = new List<TreeData>();
            BusinessObjectCollection.Add(new TreeData() { TaskId = 1,TaskName = "Parent Task 1",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 2,TaskName = "Child task 1",Progress = 80,Priority = "Low",ParentId = 1 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 3,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Critical",ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 4,TaskName = "Child task 3",Duration = 6,Priority = "High",Progress = 77,ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 5,TaskName = "Parent Task 2",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 6,TaskName = "Child task 1",Duration = 4,Progress = 80,Priority = "Critical",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 7,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Low",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 8,TaskName = "Child task 3",Duration = 6,Progress = 77,Priority = "High",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 9,TaskName = "Child task 4",Duration = 6,Progress = 77,Priority = "Low",ParentId = 5});
            return BusinessObjectCollection;
        }
    }
}

Export current page

PDF export provides an option to export the current page into PDF. To export current page, define the exportType to CurrentPage.

RAZOR
C#
@using TreeGridComponent.Data;
@using Syncfusion.Blazor.TreeGrid;

<SfTreeGrid @ref="TreeGrid" DataSource="@TreeGridData" AllowPdfExport="true" IdMapping="TaskId" ParentIdMapping="ParentId" TreeColumnIndex="1"
             Toolbar="@(new List<string>() { "PdfExport" })">
    <TreeGridEvents OnToolbarClick="ToolbarClickHandler" TValue="TreeData"></TreeGridEvents>
    <TreeGridColumns>
        <TreeGridColumn Field="TaskId" HeaderText="Task ID" Width="80" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="TaskName" HeaderText="Task Name" Width="160"></TreeGridColumn>
        <TreeGridColumn Field="Duration" HeaderText="Duration" Width="100" Format="C2" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="StartDate" HeaderText=" Start Date" Format="yMd" Type="Syncfusion.Blazor.Grids.ColumnType.Date" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right" Width="100"></TreeGridColumn>
        <TreeGridColumn Field="Priority" HeaderText="Priority" Width="80"></TreeGridColumn>
    </TreeGridColumns>
</SfTreeGrid>

@code{
    SfTreeGrid<TreeData> TreeGrid;

    public List<TreeData> TreeGridData { get; set; }

    protected override void OnInitialized()
    {
        this.TreeGridData = TreeData.GetSelfDataSource().ToList();
    }

    private void ToolbarClickHandler(Syncfusion.Blazor.Navigations.ClickEventArgs Args)
    {
        if(Args.Item.Text == "PDF Export")
        {
            Syncfusion.Blazor.Grids.PdfExportProperties ExportProperties = new Syncfusion.Blazor.Grids.PdfExportProperties();
            ExportProperties.ExportType = Syncfusion.Blazor.Grids.ExportType.CurrentPage;
            this.TreeGrid.PdfExport(ExportProperties);
        }
    }
}
namespace TreeGridComponent.Data {

public class TreeData
    {
       
            public int TaskId { get; set;}
            public string TaskName { get; set;}
            public int? Duration { get; set;}
            public int? Progress { get; set;}
            public string Priority { get; set;}
            public int? ParentId { get; set;}
      
        public static List<TreeData> GetSelfDataSource()
        {
            List<TreeData> BusinessObjectCollection = new List<TreeData>();
            BusinessObjectCollection.Add(new TreeData() { TaskId = 1,TaskName = "Parent Task 1",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 2,TaskName = "Child task 1",Progress = 80,Priority = "Low",ParentId = 1 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 3,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Critical",ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 4,TaskName = "Child task 3",Duration = 6,Priority = "High",Progress = 77,ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 5,TaskName = "Parent Task 2",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 6,TaskName = "Child task 1",Duration = 4,Progress = 80,Priority = "Critical",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 7,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Low",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 8,TaskName = "Child task 3",Duration = 6,Progress = 77,Priority = "High",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 9,TaskName = "Child task 4",Duration = 6,Progress = 77,Priority = "Low",ParentId = 5});
            return BusinessObjectCollection;
        }
    }
}

Export hidden columns

PDF export provides an option to export hidden columns of the Tree Grid by defining the includeHiddenColumn as true.

RAZOR
C#
@using TreeGridComponent.Data;
@using Syncfusion.Blazor.TreeGrid;

<SfTreeGrid @ref="TreeGrid" DataSource="@TreeGridData" AllowPdfExport="true" IdMapping="TaskId" ParentIdMapping="ParentId" TreeColumnIndex="1"
             Toolbar="@(new List<string>() { "PdfExport" })">
    <TreeGridEvents OnToolbarClick="ToolbarClickHandler" TValue="TreeData"></TreeGridEvents>
    <TreeGridColumns>
        <TreeGridColumn Field="TaskId" HeaderText="Task ID" Width="80" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="TaskName" HeaderText="Task Name" Width="160"></TreeGridColumn>
        <TreeGridColumn Field="Duration" HeaderText="Duration" Width="100" Format="C2" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="StartDate" Visible="false" HeaderText=" Start Date" Format="yMd" Type="Syncfusion.Blazor.Grids.ColumnType.Date" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right" Width="100"></TreeGridColumn>
        <TreeGridColumn Field="Priority" HeaderText="Priority" Width="80"></TreeGridColumn>
    </TreeGridColumns>
</SfTreeGrid>

@code{
    SfTreeGrid<TreeData> TreeGrid;

    public List<TreeData> TreeGridData { get; set; }

    protected override void OnInitialized()
    {
        this.TreeGridData = TreeData.GetSelfDataSource().ToList();
    }

    private void ToolbarClickHandler(Syncfusion.Blazor.Navigations.ClickEventArgs Args)
    {
        if(Args.Item.Text == "PDF Export")
        {
            Syncfusion.Blazor.Grids.PdfExportProperties ExportProperties = new Syncfusion.Blazor.Grids.PdfExportProperties();
            ExportProperties.IncludeHiddenColumn = true;
            this.TreeGrid.PdfExport(ExportProperties);
        }
    }
}
namespace TreeGridComponent.Data {

public class TreeData
    {
       
            public int TaskId { get; set;}
            public string TaskName { get; set;}
            public int? Duration { get; set;}
            public int? Progress { get; set;}
            public string Priority { get; set;}
            public int? ParentId { get; set;}
      
        public static List<TreeData> GetSelfDataSource()
        {
            List<TreeData> BusinessObjectCollection = new List<TreeData>();
            BusinessObjectCollection.Add(new TreeData() { TaskId = 1,TaskName = "Parent Task 1",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 2,TaskName = "Child task 1",Progress = 80,Priority = "Low",ParentId = 1 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 3,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Critical",ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 4,TaskName = "Child task 3",Duration = 6,Priority = "High",Progress = 77,ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 5,TaskName = "Parent Task 2",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 6,TaskName = "Child task 1",Duration = 4,Progress = 80,Priority = "Critical",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 7,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Low",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 8,TaskName = "Child task 3",Duration = 6,Progress = 77,Priority = "High",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 9,TaskName = "Child task 4",Duration = 6,Progress = 77,Priority = "Low",ParentId = 5});
            return BusinessObjectCollection;
        }
    }
}

Theme

PDF export provides an option to include theme for exported PDF document.

To apply theme in exported PDF, define the theme in export properties.

RAZOR
C#
@using TreeGridComponent.Data;
@using Syncfusion.Blazor.TreeGrid;

<SfTreeGrid @ref="TreeGrid" DataSource="@TreeGridData" AllowPdfExport="true" IdMapping="TaskId" ParentIdMapping="ParentId" TreeColumnIndex="1"
             Toolbar="@(new List<string>() { "PdfExport" })">
    <TreeGridEvents OnToolbarClick="ToolbarClickHandler" TValue="TreeData"></TreeGridEvents>
    <TreeGridColumns>
        <TreeGridColumn Field="TaskId" HeaderText="Task ID" Width="80" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="TaskName" HeaderText="Task Name" Width="160"></TreeGridColumn>
        <TreeGridColumn Field="Duration" HeaderText="Duration" Width="100" Format="C2" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right"></TreeGridColumn>
        <TreeGridColumn Field="StartDate" HeaderText=" Start Date" Format="yMd" Type="Syncfusion.Blazor.Grids.ColumnType.Date" TextAlign="Syncfusion.Blazor.Grids.TextAlign.Right" Width="100"></TreeGridColumn>
        <TreeGridColumn Field="Priority" HeaderText="Priority" Width="80"></TreeGridColumn>
    </TreeGridColumns>
</SfTreeGrid>

@code{
    SfTreeGrid<TreeData> TreeGrid;

    public List<TreeData> TreeGridData { get; set; }

    protected override void OnInitialized()
    {
        this.TreeGridData = TreeData.GetSelfDataSource().ToList();
    }

    private void ToolbarClickHandler(Syncfusion.Blazor.Navigations.ClickEventArgs Args)
    {
        if(Args.Item.Text == "PDF Export")
        {
            Syncfusion.Blazor.Grids.PdfExportProperties ExportProperties = new Syncfusion.Blazor.Grids.PdfExportProperties();
            Syncfusion.Blazor.Grids.PdfTheme Theme = new Syncfusion.Blazor.Grids.PdfTheme();

            Syncfusion.Blazor.Grids.PdfBorder HeaderBorder = new Syncfusion.Blazor.Grids.PdfBorder();
            HeaderBorder.Color = "#64FA50";

            Syncfusion.Blazor.Grids.PdfThemeStyle HeaderThemeStyle = new Syncfusion.Blazor.Grids.PdfThemeStyle()
            {
                FontColor = "#64FA50",
                FontName = "Calibri",
                FontSize = 17,
                Bold = true,
                Border = HeaderBorder
            };
            Theme.Header = HeaderThemeStyle;

            Syncfusion.Blazor.Grids.PdfThemeStyle RecordThemeStyle = new Syncfusion.Blazor.Grids.PdfThemeStyle()
            {
                FontColor = "#64FA50",
                FontName = "Calibri",
                FontSize = 17

            };
            Theme.Record = RecordThemeStyle;

            Syncfusion.Blazor.Grids.PdfThemeStyle CaptionThemeStyle = new Syncfusion.Blazor.Grids.PdfThemeStyle()
            {
                FontColor = "#64FA50",
                FontName = "Calibri",
                FontSize = 17,
                Bold = true

            };
            Theme.Caption = CaptionThemeStyle;
            ExportProperties.Theme = Theme;
            this.TreeGrid.PdfExport(ExportProperties);
        }
    }
}
namespace TreeGridComponent.Data {

public class TreeData
    {
       
            public int TaskId { get; set;}
            public string TaskName { get; set;}
            public int? Duration { get; set;}
            public int? Progress { get; set;}
            public string Priority { get; set;}
            public int? ParentId { get; set;}
      
        public static List<TreeData> GetSelfDataSource()
        {
            List<TreeData> BusinessObjectCollection = new List<TreeData>();
            BusinessObjectCollection.Add(new TreeData() { TaskId = 1,TaskName = "Parent Task 1",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 2,TaskName = "Child task 1",Progress = 80,Priority = "Low",ParentId = 1 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 3,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Critical",ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 4,TaskName = "Child task 3",Duration = 6,Priority = "High",Progress = 77,ParentId = 2 });
            BusinessObjectCollection.Add(new TreeData() { TaskId = 5,TaskName = "Parent Task 2",Duration = 10,Progress = 70,Priority = "Critical",ParentId = null});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 6,TaskName = "Child task 1",Duration = 4,Progress = 80,Priority = "Critical",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 7,TaskName = "Child Task 2",Duration = 5,Progress = 65,Priority = "Low",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 8,TaskName = "Child task 3",Duration = 6,Progress = 77,Priority = "High",ParentId = 5});
            BusinessObjectCollection.Add(new TreeData() { TaskId = 9,TaskName = "Child task 4",Duration = 6,Progress = 77,Priority = "Low",ParentId = 5});
            return BusinessObjectCollection;
        }
    }
}

NOTE

By default, material theme is applied to exported PDF document.