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Problem hiding a COlumn in a datagrid

Hi gang,

Im busy writing my firs Windows Mobile 6 Application. - I'm a beginner ok.

My first problem: When I run the app through the emulator I get an error: Database file cannot be found. - Where does the emulator look for the database? Can I copy the file there?

My connection string when running the app off my actual device is:

this.connectionString = "Data Source=" + (System.IO.Path.GetDirectoryName(System.Reflection .Assembly.GetExecutingAssembly().GetName().CodeBas e) + "\\Details.sdf;Persist Security Info=False"); Here it works fine.

If I run the app from the Releaase Folder under the Bin folder it works fine with the following Connection string:

this.connectionString = @"Data Source=Details.sdf;File Mode=Exclusive;Persist Security Info=False";

My second question then is:

I have a data grid which data source is a datatable. the columns are: fldID, fldName, fldSurname and fdlTel.

I want to hide the fldID column. I cannot seem to access the Grid View Property nor set the widths of the columns.

I've tried the following code, but it does not change anything. It also dies not error:

DataGridTableStyle ts = new DataGridTableStyle();
ts.MappingName = "tblDetails";

// ID column style
DataGridColumnStyle id = new DataGridTextBoxColumn();
id.MappingName = "ID";
id.Width = 0;

// Name column style
DataGridColumnStyle name = new DataGridTextBoxColumn();
name.MappingName = "Name";
name.Width = this.Width - name.Width - 37;

// Surname column style
DataGridColumnStyle surname = new DataGridTextBoxColumn();
surname.MappingName = "Surname";
surname.Width = this.Width - surname.Width - 37;

// Tel column style
DataGridColumnStyle tel = new DataGridTextBoxColumn();
tel.MappingName = "Tel";
tel.Width = this.Width - tel.Width - 37;


Any help please?


Aug 15 '08 #1
4 4970
I solved the first problem:

Use a shared folder (Configure in Emulator) and copy the database file in there.

Still stuck on second issue with hiding columns etc.
Aug 15 '08 #2
Um, OK, It was not the shard folder as described above. You actually add the database file to the project then the Emulator copies it to a temp folder (I assume as I could not find the folder "ANYWHERE".

Remember this is using unbound controls and hard coding the connection.

I'm till baffled on how to hide a column in a data grid in the .Net 2.0 compact framework. also how to change the captions. The code above runs without error but also without actually doing anything.

Aug 17 '08 #3
648 Expert 512MB
For the data grid, I would create a dataset from a query on the database, and then simply not select the ID column in the query.

If it looks like the file is missing, have you checked it's properties? On the solution explorer database.sdf file > Properties > Copy always.

Does it work when you deploy it directly to a device? i.e. in the target box select "Pocket PC Device" and not "Pocket PC Emulator" when the PDA is connected.

You say that you "Ran it from the Release Folder" have you built the application in release mode before doing this? I assume you have just copied these files accross to the PDA then run them?
Aug 18 '08 #4

i'm have the same problem
i can't change column's properties or hide it

any help
Nov 12 '08 #5

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