Increment TextBox value on GridView CheckBox checked using jQuery in ASP.Net

Hi sbatcha,

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

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript">
    $(function () {
        var value = 0;
        $('[id*=chkRow]').on('click', function () {
            if ($(this).is(":checked")) {
                value = parseInt(value + 10);
                $(this).closest('tr').find('[id*=txtRow]').val(value);
            } else {
                value = parseInt(value - 10);
                $(this).closest('tr').find('[id*=txtRow]').val('');
            }
        });
    });
</script>
<asp:GridView runat="server" ID="GridView1" AutoGenerateColumns="false">
    <Columns>
        <asp:TemplateField HeaderText="CheckBox">
            <ItemTemplate>
                <asp:CheckBox ID="chkRow" runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="TextBox">
            <ItemTemplate>
                <asp:TextBox ID="txtRow" runat="server" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        System.Data.DataTable dt = new System.Data.DataTable();
        dt.Columns.AddRange(new System.Data.DataColumn[] { new System.Data.DataColumn("Id", typeof(int)) });
        for (int i = 0; i < 10; i++)
        {
            dt.Rows.Add((i + 1));
        }
        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 System.Data.DataTable = New System.Data.DataTable()
        dt.Columns.AddRange(New System.Data.DataColumn() {New System.Data.DataColumn("Id", GetType(Integer))})
        For i As Integer = 0 To 10 - 1
            dt.Rows.Add((i + 1))
        Next
        GridView1.DataSource = dt
        GridView1.DataBind()
    End If
End Sub

Screenshot