Equivalent in C# to "Handles" in VB.NET

Question

I have this code in Visual Basic, and it works when I test it. All the rows have alternate colors.

Private Sub GridView1_RowCreated(ByVal sender As Object, _
                                 ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) _
                                 Handles GridView1.RowDataBound
    If e.Row.RowType = DataControlRowType.DataRow Then
        Dim RowNum as Integer
        RowNum = e.Row.RowIndex

        If RowNum mod 2 = 1 Then
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#DDDDDD'")
        Else
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'")
        End If

        e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='DeepSkyBlue'")
        e.Row.Attributes("onclick") = Me.Page.ClientScript.GetPostBackClientHyperlink(Me.GridView1, "Select$" & e.Row.RowIndex)
    End If
End Sub

Since I am working under C# enviroment, I converted it to C#:

private void GridView1_RowCreated(object sender, System.Web.UI.WebControls.GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        int RowNum = e.Row.RowIndex;
        if (RowNum % 2 == 1)
        {
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#DDDDDD'");
        }
        else
        {
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor='#FFFFFF'");
        }

        e.Row.Attributes.Add("onmouseover", "this.style.backgroundColor='DeepSkyBlue'");
        e.Row.Attributes["onclick"] = this.Page.ClientScript.GetPostBackClientHyperlink(this.GridView1, "Select$" + e.Row.RowIndex);
    }
}

Is that a way I can do same as "Handles" option in Visual Basic? Please provide me the code if possible.

This may help: http://stackoverflow.com/questions/794332/migrating-handles-from-vb-net-to-c-sharp — Bob Kaufman, Oct 04 '12 at 20:32

score 4 · Accepted Answer · answered Oct 04 '12 at 20:37

You'll need to add the event handler either from markup

<asp:GridView OnRowCreated="GridView1_RowCreated" runat="server" ID="MyGrid">

</asp:GridView>

or from code-behind

protected void Page_Load(object sender, EventArgs e)
{
   MyGrid.RowCreated += GridView1_RowCreated;
}

score 2 · Answer 2 · edited Oct 01 '13 at 07:34

2

You have to add the handler in Page_Load() like this:

Protected Void Page_Load(Object Sender, EventArgs e){
    GridView1.RowCreated += GridView1_RowCreated;
}

edited Oct 01 '13 at 07:34

Peter Mortensen

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answered Oct 04 '12 at 20:34

Scott Selby

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score 2 · Answer 3 · answered Oct 04 '12 at 20:35

2

You can try with

GridView1.RowCreated += GridView1_RowCreated;

Nota : I suggest you to initialize your delegate in Page_Init (Best Practise)

answered Oct 04 '12 at 20:35

Aghilas Yakoub

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I add this code "GridView1.RowCreated += GridView1_RowCreated;" from everyone suggested to Page_Load, it works with alternating color for rows after the page loaded, but when I click on a row, it changes all row backcolor to white. So I try to put in it Page_Int, it works better. What is "Best Pracise" about Page_Init? please advise. Thanks – Milacay Oct 04 '12 at 21:26
1

Always happy to help you, In your page Init you set all your registering of delegate, you can also find user control in page aspx, in order to pass arguments Milacay – Aghilas Yakoub Oct 04 '12 at 21:27

score 1 · Answer 4 · answered Oct 04 '12 at 20:38

C# as a language doesn't have a concept like the "handles" keyword. Instead, you must explicitly wire-up event definitions.

Try

protected void Page_Load(object sender, EventArgs e)
{
    GridView1.RowCreated += GridView1_RowCreated;
}

C# adds handlers by '+=' operator and remove them by '-=' operator.

Even in VB.NET you can skip "handles" if you use AutoEventWireUp="true".

Equivalent in C# to "Handles" in VB.NET

4 Answers4