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View State Causing DataList to disappear

Posted on 2009-04-10
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Last Modified: 2012-05-06
We have a ArrayList that we bind to a DataList, then we create a viewstate that contains the ArrayList.  The final line in the code,

ViewState["ParamArray"] = alParams;

is causing the DataList to disappear when we debug. If I comment out the above line, the DataList appears. Any help is appreciated.

PS - I am kind of new to ASP.NET, so let me apologize if my phrasing or anything is incorrect.
//dlParams is a DataList
 
               ArrayList alParams= new ArrayList();
                
                foreach (string s in _xmlParams)
                {
                    ReportParameters reportParameters = new ReportParameters();
                    
                    etc, etc, etc, etc
 
                    reportParameters.ID = newID;
                    reportParameters.Caption = newTitle;
                    reportParameters.DefaultValue = defval;
 
                    alParams.Add(reportParameters);
                    dlParams.DataSource = alParams;
                    dlParams.DataBind();
 
                    ViewState["ParamArray"] = alParams;
 
                }

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Question by:gregalhaig1
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Assisted Solution

by:spprivate
spprivate earned 400 total points
ID: 24117904
Move the view state commad out of the loop.
Also are you loading this Datalist in the pageload.If so make sure you put a  Postback check in the code
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Author Comment

by:gregalhaig1
ID: 24118248
I am loading the DataList on a button_Click event. I did move it outside the loop, but so far same result as before.
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Accepted Solution

by:
gregalhaig1 earned 0 total points
ID: 24119028
I used a session instead and that worked...not the exact way I wanted to do this, but it will work for now. Thanks for help!
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