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If the Combo Box control is bound to a data source, you will not be able to add new items into it during runtime. Next, service the Cell Validating event of the Data Grid View control. _ Data Grid View Cell Validating Event Args) _ Handles Data Grid View1. First, service the Cell Validating event, which is fired when the user has finished modifying the value of a cell and leaves the cell: Private Sub Data Grid View1_Cell Validating( _ By Val sender As Object, _ By Val e As System. Add(combo Box Col) The latter approach is more flexible as it allows the user to add new items into the drop-down list during runtime (see the next section for details). If it is, the drop-down style of the Combo Box control is set to Drop Down so that the user can type into it. To validate that the data entered is of the correct type, you need to service two events. _ Data Grid View Cell Validating Event Args) _ Handles Data Grid View1. The following code snippet adds a Combo Box control to the fifth column of the Data Grid View control: '---add columns to the Data Grid View control--- Data Grid View1. An alternative way would be to add the items to the Data Grid View Combo Box Column control directly, as shown: '---adding columns--- Data Grid View1. Data Source = bindingsource '---add a combobox column to the Data Grid View control--- Data Grid View1. Add(combo Box Col) The previous code showed how you can bind a Binding Source control (containing a list of items to let the users choose) to a Data Grid View Combo Box Column control inside a Data Grid View control. Add("Price", "Price") '---create a new bindingsource control--- Dim bindingsource As New Binding Source '---add the items into the control--- bindingsource. Header Text = "Types" '---data bind it--- combo Box Col. We're a friendly computing community, bustling with knowledgeable members to help solve your tech questions.Please join our friendly community by clicking the button below - it only takes a few seconds and is totally free.

Adding Items into a Data Grid View Combo Box Column Control The previous section showed how to display a Combo Box control within a cell in the Data Grid View control. This event is fired when the user is done with the typing and leaves the cell: Private Sub Data Grid View1_Cell Validating( _ By Val sender As Object, _ By Val e As System. Cell Validating Dim combo Box Column As Data Grid View Combo Box Column = _ Data Grid View1.

Still, it doesn’t make much sense when we think about the way Check Box’s work, in that, they can only ever be On or Off, and that once you have made your selection, you’re probably pretty confident that you want to change the value.

Any solution is going to involve using an event that definitely will fire to stop the Data Grid View from thinking it’s in edit mode.

This makes more sense when we think about a Text Box column.

We would not want the Cell Value Changed event firing every single time a letter was added to a person’s last name.

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