Can somebody tell me what the problem is with this gridview? I don't know whether this is a JavaScript problem, an aspx problem, an event problem, or some combo of all three.
The desired effect is that there is a hi-lite of the row created when the user hovers over the rows of the gridView. When the user selects "LinkButton2" on the row, this causes a postback and turns the entire row yellow, incidcating the current row. that much of it works fine. Except that once the user has clicked one of the links and it has turned yellow as intended, the rollover effect over the other rows no longer works. IE returns "Error: Object Required"
aspx:
vb.net codebehind:
The desired effect is that there is a hi-lite of the row created when the user hovers over the rows of the gridView. When the user selects "LinkButton2" on the row, this causes a postback and turns the entire row yellow, incidcating the current row. that much of it works fine. Except that once the user has clicked one of the links and it has turned yellow as intended, the rollover effect over the other rows no longer works. IE returns "Error: Object Required"
aspx:
Code:
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="linkButtonMessAround.aspx.vb" Inherits="TestPages_linkButtonFuckAround" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "[URL unfurl="true"]http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">[/URL]
<html xmlns="[URL unfurl="true"]http://www.w3.org/1999/xhtml"[/URL] >
<head runat="server">
<title>Untitled Page</title>
[COLOR=red] <script type="text/javascript" language="javascript" >
function changeRowColor(rowID)
{
//window.alert('test-changeRowColor');
//window.alert(rowID)
document.body.style.cursor = 'pointer';
var oldColor = '';
var color = document.getElementById(rowID).style.backgroundColor;
if(color != 'green')
{
document.getElementById(rowID).style.backgroundColor = 'green';
oldColor='green';
}
else
{
document.getElementById(rowID).style.backgroundColor = oldColor;
}
}
</script>[/color]
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton>
<asp:Panel ID="Panel1" runat="server" Height="50px" Width="125px">
</asp:Panel>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ProductID"
DataSourceID="dsTest">
<Columns>
<asp:BoundField DataField="ProductID" HeaderText="ProductID" InsertVisible="False"
ReadOnly="True" SortExpression="ProductID" />
<asp:TemplateField HeaderText="ProductName">
<ItemTemplate>
<asp:LinkButton ID="LinkButton2" runat="server" Text='<%# Eval("ProductName") %>' OnClick="turnYellow" ></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice" SortExpression="UnitPrice" />
<asp:BoundField DataField="CategoryName" HeaderText="CategoryName" SortExpression="CategoryName" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="dsTest" runat="server" ConnectionString="<%$ ConnectionStrings:NorthWindConnectionString %>"
SelectCommand="SELECT [ProductID], [ProductName], [UnitPrice], [CategoryName] FROM [Alphabetical list of products] ORDER BY [ProductName]">
</asp:SqlDataSource>
</div>
</form>
</body>
</html>vb.net codebehind:
Code:
Partial Class TestPages_linkButtonMessAround
Inherits System.Web.UI.Page
Sub turnYellow(ByVal sender As Object, ByVal e As System.EventArgs)
'this is called inline from a control on the aspx page like so:
' <asp:LinkButton ID="LinkButton2" runat="server" Text='<%# Eval("ProductName") %>' OnClick="turnYellow" ></asp:LinkButton>
Dim gv As GridView = Me.GridView1
Dim gvRowClicked As GridViewRow = sender.parent.parent
Dim gvr As GridViewRow
For Each gvr In gv.Rows
If gvr.ClientID <> gvRowClicked.ClientID Then
gvr.ControlStyle.BackColor = Nothing
Else
gvr.ControlStyle.BackColor = Drawing.Color.Yellow
End If
Next
Protected Sub GridView1_RowCreated(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowCreated
' Response.Write("GridView1_RowCreated<br>")
View_RowColor_OnMouseClick.aspx
Dim strRowID As String
If e.Row.RowType = DataControlRowType.DataRow Then
strRowID = "row" & e.Row.RowIndex
e.Row.Attributes.Add("id", "row" & e.Row.RowIndex)
e.Row.Attributes.Add("onMouseOver", "changeRowColor('" & strRowID & "');")
e.Row.Attributes.Add("onMouseOut", "changeRowColor('" & strRowID & "');")
End If
End Sub