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ValueType Mistmatch when opening an SPSite

  Asked By: Devan    Date: May 02    Category: Sharepoint    Views: 1245

I'm writing a web part to search through a Sharepoint list. I'm using
Sharepoint 2003 with WSS 2.0. I'm developing the web part with Visual
Studio 2005. The code is as follows:

SPSite mySite = new SPSite("https://www.myintranet.com");
SPWeb web = mySite.OpenWeb();
SPList myList = web.Lists["My List"];
SPQuery query = new SPQuery(myList.Views["Full View"]);

string caml = "<Where><Eq><FieldRef Name='Last Name'/>"
+"<Value Type='Text'>Smith</Value></Eq></Where>";

query.Query = caml;
SPListItemCollection results = myList.GetItems(query);
SPListItem employee = (SPListItem)results[0];
txtResult.Text = (employee["Last Name"].ToString());

I'm running the code from the server that hosts www.myintranet.com.
This code is called when I click in a button that resides inside a
Web Part Zone.

When I run it, I get the following error:

!"ValueType mismatch"
Exception Details: System.BadImageFormatException: !"ValueType

The stack trace is:

[BadImageFormatException: !"ValueType mismatch"]
Microsoft.SharePoint.SPSite.a(String A_0, SPVirtualServer A_1, a
A_2, Int32 A_3) +0
Microsoft.SharePoint.SPSite..ctor(String strUrl) +171
searchLists_ascx.btnSearch_Click(Object sender, EventArgs e) +37
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +81
eventArgument) +219
aisePostBackEvent(String eventArgument) +12
sourceControl, String eventArgument) +18
postData) +38
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

What am I doing wrong? This is my first Web Part so any help will be



5 Answers Found

Answer #1    Answered By: Leif Cardenas     Answered On: May 02

Found the issue. It seems that this is because doesn't support Whidbey
yet, NET Framework 2.0. If anyone knows a work around please update
this posting.

Answer #2    Answered By: Jasper Hatfield     Answered On: May 02

Make all your SPPT Sites specifically use .NET 1.1 Framework? I
understand there is a new tab in the IIS properties window to do this. I
haven't seen it yet.

Alternatively, you could wait until SPPT SP2 to install .NET 2.0
Framework when it is supported.

Answer #3    Answered By: Rashawn Hopper     Answered On: May 02

What kind of a list  is "Full View"?

Are you certain that the field is called "Last Name" with a space? What
is the internal name compared to the display name?

Which statement is the code failing on?

Here is a simple query that I use all the time (notice how I've escaped
our the double quotes):

System.Text.StringBuilder queryString = new
queryString.Append(" <And>");
queryString.Append(" <Eq>");
queryString.Append(" <FieldRef Name=\"Status\" />");
queryString.Append(" <Value
queryString.Append(" </Eq>");
queryString.Append(" <Eq>");
queryString.Append(" <FieldRef Name=\"Modified\" />");
queryString.Append(" <Value Type=\"DateTime\"><Today
queryString.Append(" </Eq>");
queryString.Append(" </And>");

SPQuery query = new SPQuery();
query.Query = queryString.ToString();

//Query the list
items = list.GetItems(query);

Answer #4    Answered By: Horace Coffey     Answered On: May 02

I will test your query. I think the problem
was that I was using VS.NET 05 so will try with 03.

The "Full View" refer to a view of the list. I have not test this but
saw it in the specifications and wanted to see how it worked.

Answer #5    Answered By: Rigoberto Beard     Answered On: May 02

the query is working fine, the problem was because I was using VS.NET 05 and because I was referring to the field "Last Name" as is, instead of "Last_x0020_Name".

One last questions: I'm displaying the information in a grid, but when I render the datagrid, I also get an extra column with the list  item ID. This is the code:

//I define a class variable DataGrid dgrid before this

SPSite mysite = new SPSite("http://localhost");

SPWeb web  = mysite.OpenWeb();

SPList mylist = web.List["My List"];

SPQuery query = new SPQuery();

query.ViewFields = "<FieldRef Name='First_x0020_Name'/><FieldRef Name='Last_x0020_Name'/><FieldRef Name='Phone_x0020_Number'/>";

query.Query = "<Where><BeginsWith><FieldRef Name='First_x0020_Name'/><ValueType='Text'>"+text+"</Value></BeginsWith></Where>";

SPListItemCollection items = mylist.GetItems(query);

dgrid = new DataGrid();

dgrid.DataSource = items.GetDataTable();




// then I refer to this control when I render the web part...


This produces a table that looks like this

First_x0020_Name Last_x0020_Name Phone_x0020_Number ID
John Dwyne *** *** *** 99
John E. Smith *** *** *** 54

I don't know why I'm getting the ID and also, how can I do so the title doesn't display the hex number. Do you know how?

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