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Collection behavior when adding a new item
Message
From
25/07/2006 11:52:45
 
 
General information
Forum:
ASP.NET
Category:
Coding, syntax and commands
Environment versions
Environment:
VB 8.0
OS:
Windows XP SP2
Database:
Visual FoxPro
Miscellaneous
Thread ID:
01138855
Message ID:
01139759
Views:
11
>No. Since your collection is storing a reference to the object array you'd need to create a new one for each item in the collection - basically what you're Redim is doing now. I'd do something like this instead (sorry, C#):
>
>
>System.Collections.ArrayList ODropDownCondition = new System.Collections.ArrayList();
>
>ODropDownCondition.Add(new string[2] {"No DBUsers","Something"});
>ODropDownCondition.Add(new string[2] {"No DBUsers2","Something"});
>
>foreach (string[] s in ODropDownCondition)
>    {
>        oApp.AddJavascriptMessage(s[0]);
>    }
>
Ok, I see why I never had this problem before. In similar locations where I am using this technique to add something in a collection, I am doing something like this:
        ' Add the information for an extra option for a record
        ' expC1 Image
        ' expC2 Tooltip
        ' expC3 Javascript function
        '       Optional
        ' expC4 Url
        '       Optional
        ' expC5 Url parameter
        '       Optional
        Public Function AddExtraOptionRecord(ByVal tcImage As String, ByVal tcTooltip As String, _
         Optional ByVal tcJavascriptFunction As String = "", _
         Optional ByVal tcUrl As String = "", _
         Optional ByVal tcUrlParameter As String = "") As Boolean
            Dim loExtraOptionRecord(5) As Object
            loExtraOptionRecord(1) = tcImage
            loExtraOptionRecord(2) = tcTooltip
            loExtraOptionRecord(3) = tcJavascriptFunction
            loExtraOptionRecord(4) = tcUrl
            loExtraOptionRecord(5) = tcUrlParameter
            oExtraOptionRecord.Add(loExtraOptionRecord)
            Return True
        End Function
So, everytime I have a need to add an item in that collection, I am calling this method. As everytime I call the method, loExtraOptionRecord() is initialized, I am not facing that situation here.

I will do the same for oDropDownCondition. I will add a method in the required class and proceed by doing a call to the method whenever I have a need to add a condition. Basically, this was the best setup for me. I just don't understand why I did the oDropDownCondition with the approach that caused me some problem. :) By calling a method, the intellisense kicks in to show me what to pass as a parameter so it is also much easier to handle.
Michel Fournier
Level Extreme Inc.
Designer, architect, owner of the Level Extreme Platform
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