Delete multiple ASP.Net GridView Rows without using database in C# and VB.Net

Hi rakeshkuma,

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

HTML

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
    <Columns>
        <asp:TemplateField HeaderText="#">
            <ItemTemplate>
                <%# Container.DataItemIndex + 1 %>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:CheckBox ID="chkDel" runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="Id" Visible="false" HeaderText="Id"></asp:BoundField>
        <asp:BoundField DataField="Name" HeaderText="Name"></asp:BoundField>
        <asp:BoundField DataField="Country" HeaderText="Country"></asp:BoundField>
    </Columns>
</asp:GridView>
<asp:Button ID="btnDeleteRecord" runat="server" OnClick="btnDeleteRecord_Click" Text="Delete" />

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"),
                        new DataColumn("Name"),
                        new DataColumn("Country") });
        dt.Rows.Add(1, "John Hammond", "USA");
        dt.Rows.Add(2, "Mudassar Khan", "India");
        dt.Rows.Add(3, "Suzanne Mathews", "France");
        dt.Rows.Add(4, "Robert Schidner", "UK");
        ViewState["Data"] = dt;
        this.BindGrid();
    }
}

protected void btnDeleteRecord_Click(object sender, EventArgs e)
{
    DataTable dt = ViewState["Data"] as DataTable;
    for (int i = GridView1.Rows.Count - 1; i >= 0; i--)
    {
        GridViewRow row = GridView1.Rows[i];
        CheckBox chkDelete = row.FindControl("chkDel") as CheckBox;
        if (chkDelete.Checked)
        {
            dt.Rows[i].Delete();
        }
    }

    ViewState["Data"] = dt;
    this.BindGrid();
}

private void BindGrid()
{
    DataTable 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
        Dim dt As DataTable = New DataTable()
        dt.Columns.AddRange(New DataColumn(2) {
                            New DataColumn("Id"),
                            New DataColumn("Name"),
                            New DataColumn("Country")})
        dt.Rows.Add(1, "John Hammond", "USA")
        dt.Rows.Add(2, "Mudassar Khan", "India")
        dt.Rows.Add(3, "Suzanne Mathews", "France")
        dt.Rows.Add(4, "Robert Schidner", "UK")
        ViewState("Data") = dt
        Me.BindGrid()
    End If
End Sub

Protected Sub btnDeleteRecord_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim dt As DataTable = TryCast(ViewState("Data"), DataTable)
    For i As Integer = GridView1.Rows.Count - 1 To 0 Step -1
        Dim row As GridViewRow = GridView1.Rows(i)
        Dim chkDelete As CheckBox = TryCast(row.FindControl("chkDel"), CheckBox)
        If chkDelete.Checked Then
            dt.Rows(i).Delete()
        End If
    Next

    ViewState("Data") = dt
    Me.BindGrid()
End Sub

Private Sub BindGrid()
    Dim dt As DataTable = TryCast(ViewState("Data"), DataTable)
    GridView1.DataSource = dt
    GridView1.DataBind()
End Sub

Screenshot