Remove row from ASP.Net GridView on Button Click using C# and VB.Net

Hi smile,

Refer the sample code.

HTML

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:BoundField DataField="Num" HeaderText="Number" />
    </Columns>
</asp:GridView>
<br />
<asp:Button ID="Button1" runat="server" Text="Call" OnClick="OnCall" />
<hr />
Name: <asp:Label ID="lblName" runat="server" /><br />
Token: <asp:Label ID="lblToken" runat="server" />

Namespaces

C#

using System.Data;

VB.Net

Imports System.Data

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        this.BindGrid();
    }
}

protected void OnCall(object sender, EventArgs e)
{
    lblName.Text = string.Empty;
    lblToken.Text = string.Empty;
    DataTable dt = ViewState["Data"] as DataTable;
    if (dt.Rows.Count > 0)
    {
        lblName.Text = dt.Rows[0][0].ToString();
        lblToken.Text = dt.Rows[0][1].ToString();
        dt.Rows[0].Delete();
        ViewState["Data"] = dt;
        this.BindGrid();
    }
}

private void BindGrid()
{
    DataTable dt = new DataTable();
    if (ViewState["Data"] == null)
    {
        dt.Columns.AddRange(new DataColumn[2] { new DataColumn("Name"), new DataColumn("Num") });
        dt.Rows.Add("Chetak", "12345");
        dt.Rows.Add("Vidhan", "13456");
        dt.Rows.Add("Satya", "12765");
        dt.Rows.Add("Akash", "98345");
        dt.Rows.Add("Amit", "56129");
        ViewState["Data"] = dt;
    }
    else
    {
        dt = ViewState["Data"] as DataTable;
    }

    GridView1.DataSource = dt;
    GridView1.DataBind();
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Me.BindGrid()
    End If
End Sub

Protected Sub OnCall(ByVal sender As Object, ByVal e As EventArgs)
    lblName.Text = String.Empty
    lblToken.Text = String.Empty
    Dim dt As DataTable = TryCast(ViewState("Data"), DataTable)

    If dt.Rows.Count > 0 Then
        lblName.Text = dt.Rows(0)(0).ToString()
        lblToken.Text = dt.Rows(0)(1).ToString()
        dt.Rows(0).Delete()
        ViewState("Data") = dt
        Me.BindGrid()
    End If
End Sub

Private Sub BindGrid()
    Dim dt As DataTable = New DataTable()

    If ViewState("Data") Is Nothing Then
        dt.Columns.AddRange(New DataColumn(1) {New DataColumn("Name"), New DataColumn("Num")})
        dt.Rows.Add("Chetak", "12345")
        dt.Rows.Add("Vidhan", "13456")
        dt.Rows.Add("Satya", "12765")
        dt.Rows.Add("Akash", "98345")
        dt.Rows.Add("Amit", "56129")
        ViewState("Data") = dt
    Else
        dt = TryCast(ViewState("Data"), DataTable)
    End If

    GridView1.DataSource = dt
    GridView1.DataBind()
End Sub

Screenshot