In this article I will explain with an example, how to hide GridView column programmatically in ASP.Net using C# and VB.Net.
The GridView column will be programmatically hidden when CheckBox is unchecked in ASP.Net using C# and VB.Net.
 
 

HTML Markup

The HTML Markup consists of following controls:
CheckBox - For hide TemplateField column.
GridView – For displaying data.

Columns

The GridView consists of two BoundFIeld columns, and one TemplateField column.
TemplateField - The TemplateField column consists of ItemTemplate.
ItemTemplate - It consists of a Label.
<asp:CheckBox ID="chkCountry" Text="Show Hide Country" runat="server" OnCheckedChanged="OnCheckedChanged"
    AutoPostBack="true" Checked="true" />
<hr />
<asp:GridView ID="gvCustomers" runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Id" ItemStyle-Width="30" />
        <asp:BoundField DataField="Name" HeaderText="Name" ItemStyle-Width="150" />
        <asp:TemplateField HeaderText="Country" ItemStyle-Width="150">
            <ItemTemplate>
                <asp:Label Text='<%# Eval("Country")%>' runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>
 
 

Namespaces

You will need to import the following namespace.
C#
using System.Data;
 
VB.Net
Imports System.Data
 
 

Binding the ASP.Net GridView control

Inside the Page_Load event handler, an object of DataTable is created.
Then, three columns are added to the DataTable Columns collection using the AddRange method.
An Array of objects of type DataColumn is specified which will hold the name and the optional parameter Data Type i.e. the Type of the column.
Once the schema is ready i.e. all the columns are defined, some rows have been added using the Rows.Add method.
Finally, DataTable is assigned to the DataSource property of the GridView and the GridView is populated.
Note: For more details about dynamic DataTable please refer my article Create DataTable dynamically and bind to GridView in ASP.Net.
 
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"),
                            new DataColumn("Name"),
                            new DataColumn("Country") });
        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");
        gvCustomers.DataSource = dt;
        gvCustomers.DataBind();
    }
}
 
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"),
                            New DataColumn("Name"),
                            New DataColumn("Country")})
        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")
        gvCustomers.DataSource = dt
        gvCustomers.DataBind()
    End If
End Sub
 
 

Dynamically Show Hide TemplateField column in ASP.Net GridView

Inside the OnCheckChanged event handler, the third column i.e. Country column of the GridView is made visible or hidden based on the whether the CheckBox is checked or unchecked respectively.
C#
protected void OnCheckedChanged(object sender EventArgs e)
{
    gvCustomers.Columns[2].Visible = (sender as CheckBox).Checked;
}
 
VB.Net
Protected Sub OnCheckedChanged(sender As Object, e As EventArgs)
    gvCustomers.Columns(2).Visible = TryCast(sender, CheckBox).Checked
End Sub
 
 

Screenshot

Hide GridView column programmatically in ASP.Net
 
 

Demo

View Demo
 
 

Downloads

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