Hi I'm doing a winform application and uses a gridview, a textbox and a button in VS2005. I'm trying to make a query that gives me all lastnames starting with the letter I enter in my textbox. It works for me to enter a complete lastname ...

I'm just creating a simple calculator in C# (windows form) . I've created a "User Help" which is a pdf file, what I want is to display that pdf file if the user clicks on the "Help" button in the WinForm. If assumed th ...

please tell how to Data calculate Debit Credit in WinForm C# database Ms Access.

I created a DGV and linked it with an mdb file, but I don't know what I should be doing to identify the changed cells? Bcoz I need to update the mdb file when the DGV cell is changed in the winForm. I've been reading thru http://msdn.micro ...

How to make a combobox read only in C# (windows form)? I had manually populated the collection in the list of combobox items, I want that the user should not be able to change the visible text in the combobox.

The update code line [code]this.manhrsTableAdapter.Update(this.manHrsDataSet.Manhrs);[/code] Is generating error: InvalidOperationException was handled. Update requires a valid UpdateCommand when passed DataRow collection w ...