Rowvalidating example linq not updating

You can use a Data Grid View Combo Box Column to act a as "look up table" to show a user friendly version of the field, rather than just a numeric equivalent.Not only does this look better, it also prevents the user from selecting a value that would violate the foreign key constraint (meaning, you can't select a numeric value that doesn't exist in the related table) Take a look at the following example that replaces a numeric "Category ID" value with the associated user-friendly "Category" string from another table (called "Categories"). Columns("Category ID")) ' remove the existing column Data Grid View1. Remove At(index) ' create a new combobox column that we use as a "lookup" Dim dgvc As New Data Grid View Combo Box Column dgvc.From Visual Studio, all you'd have to do is add the MDB file to the project and it will automatically launch the Data Source Conversion Wizard. You can perform most of these tweaks by either using the designer or via code. Padding = p ' set the monetary string format style.

It has the initial "look and feel" of an Excel spreadsheet.

Let's see what's required to implement a custom column control.

The source code for the custom Data Grid View Masked Edit Column is found below.

For example, you could create a new column type that supports the Masked Edit feature found in the Masked Text Box control.

This new custom column type would be very useful when trying to prevent input errors.

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The example below shows how you could replace an existing automatically-generated "Units In Stock" column with a new custom column that supports the Masked Edit feature. Columns("Units In Stock")) ' remove the existing column Data Grid View1. Remove At(index) ' create a new custom column Dim dgv Masked Edit As New Data Grid View Masked Edit Column dgv Masked Edit.

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