Uncheck other ASP.Net GridView CheckBoxes when same value is checked using C# and VB.Net

Hi dorsa,

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="Selectdata">
            <ItemTemplate>
                <asp:CheckBox ID="chkSelect" runat="server" Checked='<%# Convert.ToBoolean(Eval("Checked").ToString()) %>'
                    OnCheckedChanged="OnCheckedChanged" AutoPostBack="true" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="PageName" HeaderText="PageName" />
    </Columns>
</asp:GridView>

Namespaces

C#

using System.Data;

VB.Net

Imports System.Data

Code

C#

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

private void BindGridView()
{
    DataTable dt;
    if (ViewState["Data"] == null)
    {
        dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[] { new DataColumn("PageName"), new DataColumn("Checked", typeof(bool)) });
        dt.Rows.Add("John Hammond", false);
        dt.Rows.Add("Rick Stewards", false);
        dt.Rows.Add("Huang He", false);
        dt.Rows.Add("Mudassar Khan", false);
        dt.Rows.Add("John Hammond", false);
        dt.Rows.Add("Rick Stewards", false);
        dt.Rows.Add("Huang He", false);
        dt.Rows.Add("Mudassar Khan", false);
    }
    else
    {
        dt = ViewState["Data"] as DataTable;
    }
    GridView1.DataSource = dt;
    GridView1.DataBind();
    ViewState["Data"] = dt;
}

protected void OnCheckedChanged(object sender, EventArgs e)
{
    GridViewRow selectedRow = (sender as CheckBox).NamingContainer as GridViewRow;
    string selectedName = selectedRow.Cells[1].Text;
    int index = selectedRow.RowIndex;
    if (ViewState["Data"] != null)
    {
        DataTable dt = ViewState["Data"] as DataTable;
        dt.Rows[index]["Checked"] = (sender as CheckBox).Checked;
        if ((sender as CheckBox).Checked)
        {
            int duplicateCount = dt.Select("PageName='" + selectedName + "'").Length;
            if (duplicateCount > 0)
            {
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    if (i != index)
                    {
                        if (dt.Rows[i]["PageName"].ToString() == selectedName)
                        {
                            dt.Rows[i]["Checked"] = false;
                        }
                    }
                }
            }
        }
        ViewState["Data"] = dt;
    }
    BindGridView();
}

VB.Net

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

Private Sub BindGridView()
    Dim dt As DataTable
    If ViewState("Data") Is Nothing Then
        dt = New DataTable()
        dt.Columns.AddRange(New DataColumn() {New DataColumn("PageName"), New DataColumn("Checked", GetType(Boolean))})
        dt.Rows.Add("John Hammond", False)
        dt.Rows.Add("Rick Stewards", False)
        dt.Rows.Add("Huang He", False)
        dt.Rows.Add("Mudassar Khan", False)
        dt.Rows.Add("John Hammond", False)
        dt.Rows.Add("Rick Stewards", False)
        dt.Rows.Add("Huang He", False)
        dt.Rows.Add("Mudassar Khan", False)
    Else
        dt = TryCast(ViewState("Data"), DataTable)
    End If
    GridView1.DataSource = dt
    GridView1.DataBind()
    ViewState("Data") = dt
End Sub

Protected Sub OnCheckedChanged(ByVal sender As Object, ByVal e As EventArgs)
    Dim selectedRow As GridViewRow = TryCast((TryCast(sender, CheckBox)).NamingContainer, GridViewRow)
    Dim selectedName As String = selectedRow.Cells(1).Text
    Dim index As Integer = selectedRow.RowIndex
    If ViewState("Data") IsNot Nothing Then
        Dim dt As DataTable = TryCast(ViewState("Data"), DataTable)
        dt.Rows(index)("Checked") = (TryCast(sender, CheckBox)).Checked
        If (TryCast(sender, CheckBox)).Checked Then
            Dim duplicateCount As Integer = dt.[Select]("PageName='" & selectedName & "'").Length
            If duplicateCount > 0 Then
                For i As Integer = 0 To dt.Rows.Count - 1
                    If i <> index Then
                        If dt.Rows(i)("PageName").ToString() = selectedName Then
                            dt.Rows(i)("Checked") = False
                        End If
                    End If
                Next
            End If
        End If
        ViewState("Data") = dt
    End If
    BindGridView()
End Sub

Screenshot