Hello!
I developed a composite control that inherits from HyperLink and overrides
Render method.
In web form I am using this control with DataGrid. On DataGrid ItemDataBound
event I set ImageWidth and ImageHeight values programmaticall y. But on
post-back the control loses ImageWidth and ImageHeight values.
What I am doing wrong?
Thank you!
James
CODE:
-----------------------
Protected Overrides Sub Render(ByVal Output As System.Web.UI.H tmlTextWriter)
Output.AddAttri bute(HtmlTextWr iterAttribute.H ref, Me.NavigateUrl)
Output.RenderBe ginTag(HtmlText WriterTag.A)
If ImageUrl.Length = 0 Then
Output.Write([Text])
Else
Output.AddAttri bute(HtmlTextWr iterAttribute.S rc, ImageUrl)
Output.AddAttri bute(HtmlTextWr iterAttribute.A lt, [Text])
Output.AddAttri bute(HtmlTextWr iterAttribute.H eight, ImageHeight)
Output.AddAttri bute(HtmlTextWr iterAttribute.W idth, ImageWidth)
If Not (ImageHeight Is Nothing) Then
Output.AddAttri bute(HtmlTextWr iterAttribute.H eight, ImageHeight)
End If
If Not (ImageWidth Is Nothing) Then
Output.AddAttri bute(HtmlTextWr iterAttribute.W idth, ImageWidth)
End If
Output.RenderBe ginTag(HtmlText WriterTag.Img)
Output.RenderEn dTag()
End If
Output.RenderEn dTag()
End Sub
2  3501 
you should save your values in a viewstate or a inline property... It loses
its state..
--
Thanks,
Yunus Emre ALPÖZEN
BSc, MCAD.NET
"James T." <gi*****@hotmai l.com> wrote in message
news:eX******** ********@TK2MSF TNGP14.phx.gbl. .. Hello!
I developed a composite control that inherits from HyperLink and overrides
Render method.
In web form I am using this control with DataGrid. On DataGrid
ItemDataBound event I set ImageWidth and ImageHeight values
programmaticall y. But on post-back the control loses ImageWidth and
ImageHeight values.
What I am doing wrong?
Thank you!
James
CODE:
-----------------------
Protected Overrides Sub Render(ByVal Output As
System.Web.UI.H tmlTextWriter)
Output.AddAttri bute(HtmlTextWr iterAttribute.H ref, Me.NavigateUrl)
Output.RenderBe ginTag(HtmlText WriterTag.A)
If ImageUrl.Length = 0 Then
Output.Write([Text])
Else
Output.AddAttri bute(HtmlTextWr iterAttribute.S rc, ImageUrl)
Output.AddAttri bute(HtmlTextWr iterAttribute.A lt, [Text])
Output.AddAttri bute(HtmlTextWr iterAttribute.H eight, ImageHeight)
Output.AddAttri bute(HtmlTextWr iterAttribute.W idth, ImageWidth)
If Not (ImageHeight Is Nothing) Then
Output.AddAttri bute(HtmlTextWr iterAttribute.H eight, ImageHeight)
End If
If Not (ImageWidth Is Nothing) Then
Output.AddAttri bute(HtmlTextWr iterAttribute.W idth, ImageWidth)
End If
Output.RenderBe ginTag(HtmlText WriterTag.Img)
Output.RenderEn dTag()
End If
Output.RenderEn dTag()
End Sub
You should probably be storing those values in ViewState between postbacks.
Here's an example of a custom control that uses ViewState to store similar
custom values and retrieve them again when needed. http://SteveOrr.net/articles/InheritAndExtend.aspx
--
I hope this helps,
Steve C. Orr, MCSD, MVP http://SteveOrr.net
"James T." <gi*****@hotmai l.com> wrote in message
news:eX******** ********@TK2MSF TNGP14.phx.gbl. .. Hello!
I developed a composite control that inherits from HyperLink and overrides
Render method.
In web form I am using this control with DataGrid. On DataGrid
ItemDataBound event I set ImageWidth and ImageHeight values
programmaticall y. But on post-back the control loses ImageWidth and
ImageHeight values.
What I am doing wrong?
Thank you!
James
CODE:
-----------------------
Protected Overrides Sub Render(ByVal Output As
System.Web.UI.H tmlTextWriter)
Output.AddAttri bute(HtmlTextWr iterAttribute.H ref, Me.NavigateUrl)
Output.RenderBe ginTag(HtmlText WriterTag.A)
If ImageUrl.Length = 0 Then
Output.Write([Text])
Else
Output.AddAttri bute(HtmlTextWr iterAttribute.S rc, ImageUrl)
Output.AddAttri bute(HtmlTextWr iterAttribute.A lt, [Text])
Output.AddAttri bute(HtmlTextWr iterAttribute.H eight, ImageHeight)
Output.AddAttri bute(HtmlTextWr iterAttribute.W idth, ImageWidth)
If Not (ImageHeight Is Nothing) Then
Output.AddAttri bute(HtmlTextWr iterAttribute.H eight, ImageHeight)
End If
If Not (ImageWidth Is Nothing) Then
Output.AddAttri bute(HtmlTextWr iterAttribute.W idth, ImageWidth)
End If
Output.RenderBe ginTag(HtmlText WriterTag.Img)
Output.RenderEn dTag()
End If
Output.RenderEn dTag()
End Sub This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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