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.

Answer 1

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;
}

Answer 2

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

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

Answer 3

You can try with

GridView1.RowCreated += GridView1_RowCreated;

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

Answer 4

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".