How to hide GridView columns from code behind using C# in ASP.Net

Hi kishore21,

I have created a sample which full fill your requirement you need to modify it according to your need

HTML

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

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[] { new DataColumn("Name"), new DataColumn("Age"), new DataColumn("DOB"), new DataColumn("PhoneNumber") });
        dt.Rows.Add("John Hammond", 20, "1996/31/05", 9852456334);
        dt.Rows.Add("Mudassar Khan", 25, "1990/25/01", 9684326445);
        dt.Rows.Add("Suzanne Mathews", 35, "1980/10/02", 978726412);
        dt.Rows.Add("Robert Schidner", 40, "1975/20/03", 9875262456);
        gvDetails.DataSource = dt;
        gvDetails.DataBind();
    }
}

protected void gvDetails_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.Header)
    {
        e.Row.Cells[3].Visible = false;
    }
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        e.Row.Cells[3].Visible = false;
    }
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs)
	If Not IsPostBack Then
		Dim dt As New DataTable()
		dt.Columns.AddRange(New DataColumn() {New DataColumn("Name"), New DataColumn("Age"), New DataColumn("DOB"), New DataColumn("PhoneNumber")})
		dt.Rows.Add("John Hammond", 20, "1996/31/05", 9852456334L)
		dt.Rows.Add("Mudassar Khan", 25, "1990/25/01", 9684326445L)
		dt.Rows.Add("Suzanne Mathews", 35, "1980/10/02", 978726412)
		dt.Rows.Add("Robert Schidner", 40, "1975/20/03", 9875262456L)
		gvDetails.DataSource = dt
		gvDetails.DataBind()
	End If
End Sub

Protected Sub gvDetails_RowDataBound(sender As Object, e As GridViewRowEventArgs)
	If e.Row.RowType = DataControlRowType.Header Then
		e.Row.Cells(3).Visible = False
	End If
	If e.Row.RowType = DataControlRowType.DataRow Then
		e.Row.Cells(3).Visible = False
	End If
End Sub

Output