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how to set value in Object[] using C#

Posted on 2008-10-07
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Last Modified: 2013-12-17
how to set value in Object[] using C#

err msg:
{"Object reference not set to an instance of an object."}


object[] argList;
            // error in this line
            argList.SetValue(documentLibraryGUID, 1);
            argList.SetValue(string.Empty, 2);
            argList.SetValue(string.Empty, 3);
            argList.SetValue(string.Empty, 4);
            argList.SetValue(string.Empty, 5);
            argList.SetValue(QueryOptions, 6);
            argList.SetValue(webId, 7);

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Question by:Vivek Thangaswamy
5 Comments
 
LVL 18

Assisted Solution

by:Priest04
Priest04 earned 50 total points
ID: 22662489
You havent initialized objects.


object[] argList = new object[7];


what exactly are you trying to do here. why dont you use List<string>?

Goran
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LVL 2

Assisted Solution

by:CAnuszczyk
CAnuszczyk earned 50 total points
ID: 22662552
setvalue starts at index of 0

object[] argList = new object[8];
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LVL 1

Expert Comment

by:Adecus
ID: 22662738
Also, if you want to dynamically grow your object array you can use an ArrayList:

ArrayList list = new ArrayList();
list.Items.Add(documentLibraryGUID);
list.Items.Add(string.Empty);
list.Items.Add(string.Empty);
list.Items.Add(string.Empty);
list.Items.Add(string.Empty);
list.Items.Add(QueryOptions);
list.Items.Add(webId);

object[] argList = list.ToArray();
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LVL 55

Accepted Solution

by:
Jaime Olivares earned 200 total points
ID: 22662742
it should be:

            object[] argList = new object[7];
            argList.SetValue(documentLibraryGUID, 0);
            argList.SetValue(string.Empty, 1);
            argList.SetValue(string.Empty, 2);
            argList.SetValue(string.Empty, 3);
            argList.SetValue(string.Empty, 4);
            argList.SetValue(QueryOptions, 5);
            argList.SetValue(webId, 6);
0
 
LVL 55

Assisted Solution

by:Jaime Olivares
Jaime Olivares earned 200 total points
ID: 22662762
also could be:

object[] argList = new object[] { documentLibraryGUID, "", "", "", "", QueryOptions, webId };
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