Show Hide ASP.Net GridView AutoGenerate Select Button based on DropDownList using C# and VB.Net

Hi akhter,

Check this example. Now please take its reference and correct your code.

HTML

<asp:DropDownList ID="ddlStatus" runat="server" AutoPostBack="true" OnSelectedIndexChanged="Changed">
    <asp:ListItem Selected="True">Select</asp:ListItem>
    <asp:ListItem>Receive</asp:ListItem>
    <asp:ListItem>Pending</asp:ListItem>
</asp:DropDownList>
<hr />
<asp:GridView runat="server" ID="GridView1" AutoGenerateColumns="False" AutoGenerateSelectButton="true">
    <Columns>
        <asp:BoundField DataField="ID" HeaderText="ID" />
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:BoundField DataField="Country" HeaderText="Country" />
    </Columns>
</asp:GridView>

Code

C#

private void BindgridView()
{
    System.Data.DataTable dt = new System.Data.DataTable();
    dt.Columns.AddRange(new System.Data.DataColumn[] { 
                new System.Data.DataColumn("Id", typeof(int)),
                new System.Data.DataColumn("Name", typeof(string)),
                new System.Data.DataColumn("Country",typeof(string)) });
    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");
    GridView1.DataSource = dt;
    GridView1.DataBind();
}

protected void Changed(object sender, EventArgs e)
{
    statsGRN();
}

private void statsGRN()
{
    if (ddlStatus.SelectedItem.Text.Trim().ToLower() == "pending")
    {
        this.GridView1.AutoGenerateSelectButton = true;
        this.BindgridView();
    }
    else if (ddlStatus.SelectedItem.Text.Trim().ToLower() == "receive")
    {
        this.GridView1.AutoGenerateSelectButton = false;
        this.BindgridView();
    }
}

VB.Net

Private Sub BindgridView()
    Dim dt As System.Data.DataTable = New System.Data.DataTable()
    dt.Columns.AddRange(New System.Data.DataColumn() {
                        New System.Data.DataColumn("Id", GetType(Integer)),
                        New System.Data.DataColumn("Name", GetType(String)),
                        New System.Data.DataColumn("Country", GetType(String))})
    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")
    GridView1.DataSource = dt
    GridView1.DataBind()
End Sub

Protected Sub Changed(ByVal sender As Object, ByVal e As EventArgs)
    statsGRN()
End Sub

Private Sub statsGRN()
    If ddlStatus.SelectedItem.Text.Trim().ToLower() = "pending" Then
        Me.GridView1.AutoGenerateSelectButton = True
        Me.BindgridView()
    ElseIf ddlStatus.SelectedItem.Text.Trim().ToLower() = "receive" Then
        Me.GridView1.AutoGenerateSelectButton = False
        Me.BindgridView()
    End If
End Sub

Screenshot