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Databind DataList derived control in control itself
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This message was discovered on ASPFriends.com 'aspngcontrolscs' list.


Michiel van Otegem
I have a control where I inherit from the DataList control. Instead of databinding this from my page, I want this control to Databind itself to a source stored in the cache (or otherwise transparantly created).
What I tried was overriding CreateChildControls as follows:

protected override void CreateChildControls()

{

DataSet dsMenu = Core.GetMenuData(Sitemap);

this.DataSource = dsMenu.Tables["Menu"].DefaultView;

this.DataBind();

base.CreateChildControls();

}

No I know that the data source contains several rows of data, but the result is my templates repeated as many times as there are rows, but with no data in them. Also if I derive from the DataGrid control, I perfectly get all the rows (without data) and the names of the columns. I've checked the data by writing it to the Trace log, and it's in there... it just doesn't show up. I'm obviously doing something wrong or performing my code in the wrong method. I tried overriding other methods of he DataList control, but those that would be relevant give me problems when I try to override.

---
Michiel van Otegem
ASPFriends.com Moderation Team

ASPNL.com - ASP/ASP.NET/XML Teacher
http://www.aspnl.com
http://www.aspalliance.com/michiel
---
Teach Yourself XSLT in 21 Days
http://www.amazon.com/exec/obidos/ASIN/0672323184/aspnlcom-20
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Andy Smith
try moving the binding to a more steady method... like say the Load event. CreateChildControls has no definite time of calling.

__
Andy Smith
Chief Code Monkey

-----Original Message-----
From: Michiel van Otegem [mailto:Click here to reveal e-mail address]
Sent: Tuesday, June 18, 2002 2:43 AM
To: aspngcontrolscs
Subject: [aspngcontrolscs] Databind DataList derived control in control itself

I have a control where I inherit from the DataList control. Instead of databinding this from my page, I want this control to Databind itself to a source stored in the cache (or otherwise transparantly created).
What I tried was overriding CreateChildControls as follows:

protected override void CreateChildControls()

{

DataSet dsMenu = Core.GetMenuData(Sitemap);

this.DataSource = dsMenu.Tables["Menu"].DefaultView;

this.DataBind();

base.CreateChildControls();

}

No I know that the data source contains several rows of data, but the result is my templates repeated as many times as there are rows, but with no data in them. Also if I derive from the DataGrid control, I perfectly get all the rows (without data) and the names of the columns. I've checked the data by writing it to the Trace log, and it's in there... it just doesn't show up. I'm obviously doing something wrong or performing my code in the wrong method. I tried overriding other methods of he DataList control, but those that would be relevant give me problems when I try to override.

---
Michiel van Otegem
ASPFriends.com Moderation Team

ASPNL.com - ASP/ASP.NET/XML Teacher
http://www.aspnl.com
http://www.aspalliance.com/michiel
---
Teach Yourself XSLT in 21 Days
http://www.amazon.com/exec/obidos/ASIN/0672323184/aspnlcom-20

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Nikhil Kothari
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System.Data.DataSet
System.Web.UI.WebControls.DataGrid
System.Web.UI.WebControls.DataList
System.Windows.Forms.DataGrid




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