Hello, I am new to and I am using a datagridview which seems to do all that I need for the application I need. Then user corrects only one of the invalid cells/fields in the grid, the edit routine will only check that row and never look thru the grid checking all of the cells/fields.
But I am not sure if there is a way to loop thru the grid and verify the data before the update occurs. get the data from a SQL db and present the data to the user. If user changes multiple rows, and enters invalid data in a field/cell on different rows. Not sure if that is doable in vb.net, or if there is something I have not looked at or know about. Click Dim grno As String update Sw = True For Each row As Data Grid View Row In Data Grid View1. if all good, update if bad, message user end for I am new to vb, so any help ideas would be appreciated Thanks Yes it possible, the question is when you want to perform the validation, normally we perform validation when a cell value changes and cell loses input focus.
Add("Price", "Price") '---add a combobox column--- Dim combo Box Col As New Data Grid View Combo Box Column '---set the header text--- combo Box Col.
This event is fired when the user tries to edit the Combo Box control: Private Sub Data Grid View1_Editing Control Showing( _ By Val sender As Object, _ By Val e As System. Editing Control Showing Dim combo Box Column As Data Grid View Combo Box Column = _ Data Grid View1.
Add("Type C") '---create a combobox column--- Dim combo Box Col As New Data Grid View Combo Box Column '---set the header--- combo Box Col.
Header Text = "Types" '---add items to it--- combo Box Col.
The Cell Validating event occurs when a cell is about to commit new content.
It is always raised before the Cell Validated event, which is described in the next section.
It is always raised before the Row Validated event, which is described in the next section.
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 parameters passed to the validating event handler are two: The Row Validated event occurs when the row has validated the new content.
It is raised after the Row Validating event (when the Is Valid is not set to False), described in the previous section.