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[Solved] Get Primary Key from row where Radio Button Selected

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Grid

This is a migrated thread and some comments may be shown as answers.

Allan asked on 24 Oct 2010, 07:35 PM

How do I get the Primary Key of the row in which a radio button is selected. I have tried:

Protected Sub rbt_VehicleImage_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs)

Dim item As GridDataItem = DirectCast(TryCast(sender, RadioButton).NamingContainer, GridDataItem)

Dim rdBtn As RadioButton = TryCast(sender, RadioButton)

If rdBtn.Checked = True Then

Dim sql As String

Dim strConnString As [String] = System.Configuration.ConfigurationManager.ConnectionStrings("CF_SQL_Connection").ConnectionString()

sql = "UPDATE CF_Images SET DefaultImage = @Value WHERE IDVehicles = 175"

Dim connection As New SqlConnection(strConnString)

Dim command As New SqlCommand(sql, connection)

command.Parameters.Add("@Value", SqlDbType.Int).Value = "0"

command.Connection.Open()

command.ExecuteNonQuery()

command.Connection.Close()

Dim sql1 As String

Dim strConnString1 As [String] = System.Configuration.ConfigurationManager.ConnectionStrings("CF_SQL_Connection").ConnectionString()

sql1 = "UPDATE CF_Images SET DefaultImage = @Value WHERE IDVehicles = 175 AND IDImages = @IDImages"

Dim connection1 As New SqlConnection(strConnString1)

Dim command1 As New SqlCommand(sql1, connection1)

command1.Parameters.Add("@Value", SqlDbType.Int).Value = "1"

command1.Parameters.Add("@IDImages", SqlDbType.Int).Value = 333

command1.Connection.Open()

command1.ExecuteNonQuery()

command1.Connection.Close()

Dim ID As GridBoundColumn = DirectCast(rg_VehicleImages.MasterTableView.GetColumn("IDImages"), GridBoundColumn)

Dim ID2 As String = Convert.ToString(ID)

Label1.Text = ID2

Else

End If

End Sub

End Class

However the IDImages value is empty.

ANy help appreciated.

3 Answers, 1 is accepted

answered on 24 Oct 2010, 08:37 PM

I use this code in a grid with a checkbutton ... so I guess you can merge my code with yours and make it work.

You need to set DataKeyNames in the aspx.

Protected Sub ChangeFavourite(ByVal sender As Object, ByVal e As System.EventArgs)

Dim Box As CheckBox = sender

Dim item As GridDataItem = Box.NamingContainer

Dim projectno As String = item.OwnerTableView.DataKeyValues(item.ItemIndex)("ProjectNo")

Dim checked As Boolean

= Box.Checked

            .... use key value to update database ....

Good luck.

answered on 25 Oct 2010, 02:23 AM

Thank you Jens, this really helped resolve my issue.

Here is the working code for other with this same issue:

Scenario:

I needed a grid that displays images of a vehicle selected from a database on the key field IDVehicle where tbl_Images.IDVehicle = tbl_Vehicles.IDVehicle. There may be many images for the vehicle so I need to be able to allow the user to select one image as the 'default' or main image to use on reports. To do this I wanted to add a radio button to the grid so that when the user selects the radio button the database would be updated so that the DefaultImage field (SQLDataType = BIT) would be set to True for the selected radio button and all of the other buttons with the same IDVehicle would be set to False.

I used the following to accomplish this:

ASPX

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="lab.aspx.vb" Inherits="lab" %>

<%@ Register Assembly="Telerik.Web.UI, Version=2009.3.1208.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4"

Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<title></title>

<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">

<script type="text/javascript">

function MyClick(sender, eventArgs) {

var inputs = document.getElementById("<%= rg_VehicleImages.MasterTableView.ClientID %>").getElementsByTagName("input");

for (var i = 0, l = inputs.length; i < l; i++) {

var input = inputs[i];

if (input.type != "radio" || input == sender)

continue;

input.checked = false;

}

</script>

</telerik:RadCodeBlock>

</head>

<body>

<form id="form1" runat="server">

<div>

<telerik:RadGrid ID="rg_VehicleImages" runat="server"

AllowAutomaticDeletes="True" AutoGenerateDeleteColumn="True" CssClass="radgrid"

DataSourceID="sds_ImagesVehicle" GridLines="None" Width="220px">

<mastertableview autogeneratecolumns="False" datakeynames="IDImages"

datasourceid="sds_ImagesVehicle">

<rowindicatorcolumn>

<HeaderStyle Width="20px" />

</rowindicatorcolumn>

<expandcollapsecolumn>

<HeaderStyle Width="20px" />

</expandcollapsecolumn>

<Columns>

<telerik:GridTemplateColumn DefaultInsertValue="" UniqueName="rbt_VehicleImage">

<ItemTemplate>

<asp:RadioButton ID="rbt_VehicleImage" GroupName="MyGroup"

onclick="MyClick(this,event)" runat="server" AutoPostBack="True"

checked='<%# IF(Eval("DefaultImage") is DBNull.Value, False, Eval("DefaultImage")) %>'

oncheckedchanged="rbt_VehicleImage_CheckedChanged" />

</ItemTemplate>

</telerik:GridTemplateColumn>

<telerik:GridBoundColumn DataField="IDimages" DefaultInsertValue=""

HeaderText="" ItemStyle-ForeColor="White" ItemStyle-Width="2px"

SortExpression="True" Visible="True" UniqueName="IDimages">

<HeaderStyle Width="2px" />

<ItemStyle ForeColor="White" Width="2px" />

</telerik:GridBoundColumn>

<telerik:GridImageColumn AlternateText="Thumbnail"

DataImageUrlFields="FilePath, ThumbnailName" DataImageUrlFormatString="{0}/{1}"

DataType="System.String" FooterText="ImageColumn footer" HeaderText=""

ImageAlign="Middle" UniqueName="vehicleimage">

<HeaderStyle Width="75px" />

</telerik:GridImageColumn>

<telerik:GridBoundColumn DataField="ThumbnailName" DefaultInsertValue=""

HeaderText="ThumbnailName" SortExpression="ThumbnailName"

UniqueName="ThumbnailName" Visible="False">

</telerik:GridBoundColumn>

</Columns>

</mastertableview>

</telerik:RadGrid>

<br />

<asp:Button ID="Button1" runat="server" Text="Button" />

<br />

</div>

<asp:SqlDataSource ID="sds_ImagesVehicle" runat="server" ConnectionString="<%$ ConnectionStrings:CF_SQL_Connection %>"

SelectCommand="SELECT [IDImages], [DefaultImage], [IDModifiedUser], [ModifiedDate], [IDVehicles], [IDEngines], [Title], [FilePath], [FileName], [ThumbnailName], [UserID], [EnterDate] FROM [CF_Images] WHERE ([IDVehicles] = 175)"

DeleteCommand="DELETE FROM [CF_Images] WHERE [IDImages] = @IDImages"

InsertCommand=""

UpdateCommand="">

<DeleteParameters>

<asp:Parameter Name="IDImages" Type="Int32" />

</DeleteParameters>

<UpdateParameters>

</UpdateParameters>

<InsertParameters>

</InsertParameters>

</asp:SqlDataSource>

<telerik:RadScriptManager ID="RadScriptManager1" Runat="server">

</telerik:RadScriptManager>

</form>

</body>

</html>

The bit of java in the above ASPX ensures that only one radio button can be selected.

VB

Imports System.Web.Security

Imports System.Web.Security.Roles

Imports System.Web.Security.Membership

Imports System.Data

Imports System.Data.SqlClient

Imports Telerik.Web.UI

Partial Class lab

Inherits System.Web.UI.Page