Merge single checkbox for same-value rows. Code included. Help?

Programming
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1

which is to add a checkbox feature so that a single checkbox can select multiple rows with same values.

<asp:GridView ID="GridViewRemittance" runat="server" AllowPaging="True" AutoGenerateColumns="False" AutoGenerateRows="False" OnRowDataBound="GridViewRemittance_RowDataBound" BorderColor="#3366CC" BorderStyle="None" BorderWidth="1px" Font-Names="Verdana" EmptyDataText="NO DATA FOUND" OnPageIndexChanging="GridViewRemittance_PageIndexChanging" OnRowCancelingEdit="GridViewRemittance_RowCancelingEdit" OnRowEditing="GridViewRemittance_RowEditing" OnRowUpdating="GridViewRemittance_RowUpdating" PageSize="300" Width="50%" BackColor="White" CellPadding="4">
 <FooterStyle BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" BackColor="#99CCCC" ForeColor="#003399" /> 
 <PagerStyle BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" BackColor="#99CCCC" ForeColor="#003399" HorizontalAlign="Left" />
 <HeaderStyle BackColor="#006699" BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" Font-Size="15px" Height="30px" Font-Bold="True" ForeColor="White" />
 <RowStyle BorderColor="#990000" BorderStyle="Solid" BorderWidth="1px" Font-Size="13px" Height="20px" ForeColor="#000066" />
 <AlternatingRowStyle BorderColor="#990000" ForeColor="#000066" BackColor="#ffcc99" />
 <Columns>
    <asp:TemplateField HeaderText="Select">
      <ItemTemplate>
         <asp:CheckBox ID="SelectCheckBox" Width="50px" runat="server" AutoPostBack="true" OnCheckedChanged="SelectCheckBox_OnCheckedChanged" ></asp:CheckBox> 
      </ItemTemplate>
    </asp:TemplateField>

I need to add a checkbox feature in the code above so that a single checkbox can select multiple rows with the same values.

2

To add a checkbox feature so that a single checkbox can select multiple rows with the same values, you can modify the code as follows:

<asp:GridView ID="GridViewRemittance" runat="server" AllowPaging="True" AutoGenerateColumns="False" AutoGenerateRows="False" OnRowDataBound="GridViewRemittance_RowDataBound" BorderColor="#3366CC" BorderStyle="None" BorderWidth="1px" Font-Names="Verdana" EmptyDataText="NO DATA FOUND" OnPageIndexChanging="GridViewRemittance_PageIndexChanging" OnRowCancelingEdit="GridViewRemittance_RowCancelingEdit" OnRowEditing="GridViewRemittance_RowEditing" OnRowUpdating="GridViewRemittance_RowUpdating" PageSize="300" Width="50%" BackColor="White" CellPadding="4">
 <FooterStyle BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" BackColor="#99CCCC" ForeColor="#003399" /> 
 <PagerStyle BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" BackColor="#99CCCC" ForeColor="#003399" HorizontalAlign="Left" />
 <HeaderStyle BackColor="#006699" BorderColor="#CCCCCC" BorderStyle="Solid" BorderWidth="1px" Font-Size="15px" Height="30px" Font-Bold="True" ForeColor="White" />
 <RowStyle BorderColor="#990000" BorderStyle="Solid" BorderWidth="1px" Font-Size="13px" Height="20px" ForeColor="#000066" />
 <AlternatingRowStyle BorderColor="#990000" ForeColor="#000066" BackColor="#ffcc99" />
 <Columns>
    <asp:TemplateField HeaderText="Select">
      <ItemTemplate>
         <asp:CheckBox ID="SelectCheckBox" Width="50px" runat="server" AutoPostBack="true" OnCheckedChanged="SelectCheckBox_OnCheckedChanged" ></asp:CheckBox> 
      </ItemTemplate>
      <HeaderTemplate>
         <asp:CheckBox ID="SelectAllCheckBox" runat="server" AutoPostBack="true" OnCheckedChanged="SelectAllCheckBox_OnCheckedChanged" ></asp:CheckBox> 
      </HeaderTemplate>
    </asp:TemplateField>

Here, I added a HeaderTemplate within the TemplateField for the checkbox in the header row. This checkbox will act as a “Select All” checkbox. You should also add the necessary logic in the code-behind file to handle the events SelectCheckBox_OnCheckedChanged and SelectAllCheckBox_OnCheckedChanged for selecting multiple rows with the same values.