problems with custom fields added to schema.xml 1

[netsrac]

Hi all!

I added a new field to the custom list (custlist) by adding the following entry to the schema.xml:

<Field Type="Integer" Name="State" DisplayName="State" Sealed="TRUE" Hidden="TRUE" ReadOnly="FALSE"/>

I set hidden=true because I need this field completly hidden to the UI. But when I try to set or get the value in this field I get an error (Object reference not set to an instance of an object).

Here is the part of my source code:

SPWeb myweb = SPControl.GetContextWeb(Context);
myweb.AllowUnsafeUpdates = true;
SPList list = myweb.Lists[[i]"List_name"[/i]];
list.Items[0]["State"] = 1; //an item with index 0 exits!!!
list.Items[0].Update();

output.Write(list.Items[0]["State"].ToString()); //this statement causes the error

If I try this code with the "title" field of the custom list or if I set hidden=false then it works. Does anybody know how to get this work?

 

[netsrac]

I resolved the problem. With this code it works:

SPWeb myweb = SPControl.GetContextWeb(Context);
myweb.AllowUnsafeUpdates = true;
SPList list = myweb.Lists[[i]"List_name"[/i]];
SPListItem item = list.Items[0];
item.["State"] = 1;
item.Update();

output.Write(item["State"].ToString());

 

[newcomerishere]

Hi,
I have simlar situation with yours.
I have add a field to schema.xml file.
I want to validate the input from user for this field. I saw you have code sample here. But I don't know where to put the code. It should be in aspx file or some other file.

Please give me advice.
Thanks a lot.
Ying