Restrict the Groups in Blazor QueryBuilder Component

4 Aug 20212 minutes to read

The Querybuilder allows you to restrict the groups from creation based on group count. You can enable this feature by setting the MaxGroupCount property.

By default, MaxGroupCount is set as 5.

@using Syncfusion.Blazor.QueryBuilder

<SfQueryBuilder DataSource="@EmployeeData" MaxGroupCount="2">
    <QueryBuilderRule Condition="or" Rules="@Rules"></QueryBuilderRule>
    <QueryBuilderColumns>
        <QueryBuilderColumn Field="EmployeeID" Label="Employee ID" Type="ColumnType.Number"></QueryBuilderColumn>
        <QueryBuilderColumn Field="FirstName" Label="First Name" Type="ColumnType.String"></QueryBuilderColumn>
        <QueryBuilderColumn Field="HireDate" Label="Hire Date" Type="ColumnType.Date"></QueryBuilderColumn>
        <QueryBuilderColumn Field="Country" Label="Country" Type="ColumnType.String"></QueryBuilderColumn>
    </QueryBuilderColumns>
</SfQueryBuilder>

@code {
    List<RuleModel> Rules = new List<RuleModel>()
    {
        new RuleModel { Field="Country", Label="Country", Type="String", Operator="equal", Value = "England" },
        new RuleModel { Field="EmployeeID", Label="EmployeeID",  Type="Number", Operator="notequal", Value = 1001 }
    };

    public List<EmployeeDetails> EmployeeData = new List<EmployeeDetails>
    {
        new EmployeeDetails{ FirstName = "Martin", EmployeeID = 1001, Country = "England", City = "Manchester", HireDate = new DateTime(2014, 4, 23) },
        new EmployeeDetails{ FirstName = "Benjamin", EmployeeID = 1002, Country = "England", City = "Birmingham", HireDate = new DateTime(2014, 6, 19) },
        new EmployeeDetails{ FirstName = "Stuart", EmployeeID = 1003, Country = "England", City = "London", HireDate = new DateTime(2014, 7, 4) },
        new EmployeeDetails{ FirstName = "Ben", EmployeeID = 1004, Country = "USA", City = "California", HireDate = new DateTime(2014, 8, 15) },
        new EmployeeDetails{ FirstName = "Joseph", EmployeeID = 1005, Country = "Spain", City = "Madrid", HireDate = new DateTime(2014, 8, 29) }
    };

    public class EmployeeDetails
    {
        public string FirstName { get; set; }
        public int EmployeeID { get; set; }
        public string Country { get; set; }
        public string City { get; set; }
        public DateTime HireDate { get; set; }
    }
}

You can use this property in the mobile mode to restrict the nested group creation.