Hide only ASP.Net GridView header columns with a specific word in C# and VB.Net

Hi makumbisulaim...,

You can't hide the GridView Header cell based on the condition.

You need to check the specific word in each GridView header cell and if condition satisfied then set the Cell Text property with empty string.

Refer below example.

HTML

<asp:GridView ID="gvDetails" runat="server" OnRowDataBound="OnRowDataBound"></asp:GridView>

Namespaces

C#

using System.Data;

VB.Net

Imports System.Data

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[3] {
            new DataColumn("Id Set"),
            new DataColumn("Name"),
            new DataColumn("Country Set")
        });
        dt.Rows.Add(1, "John Hammond", "United States");
        dt.Rows.Add(2, "Mudassar Khan", "India");
        dt.Rows.Add(3, "Suzanne Mathews", "France");
        dt.Rows.Add(4, "Robert Schidner", "Russia");

        gvDetails.DataSource = dt;
        gvDetails.DataBind();
    }
}

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.Header)
    {
        foreach (TableCell cell in e.Row.Cells)
        {
            if (cell.Text.ToLower().Contains("set"))
            {
                cell.Text = string.Empty;
            }
        }
    }
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Dim dt As New DataTable()
        dt.Columns.AddRange(New DataColumn(2) {
            New DataColumn("Id Set"),
            New DataColumn("Name"),
            New DataColumn("Country Set")
        })
        dt.Rows.Add(1, "John Hammond", "United States")
        dt.Rows.Add(2, "Mudassar Khan", "India")
        dt.Rows.Add(3, "Suzanne Mathews", "France")
        dt.Rows.Add(4, "Robert Schidner", "Russia")

        gvDetails.DataSource = dt
        gvDetails.DataBind()
    End If
End Sub

Protected Sub OnRowDataBound(sender As Object, e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.Header Then
        For Each cell As TableCell In e.Row.Cells
            If cell.Text.ToLower().Contains("set") Then
                cell.Text = String.Empty
            End If
        Next
    End If
End Sub

Screenshot

Note: Here i am making use of Contains function. You can change it with equal or with other methods.