Updating a dataview

Data View uses it to uniquely identify items and compare them to each other.By default, Data View uses the to get the data array back.

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What we need to do, is to store the ids of items that were selected, and to update the selection on the grid any time the Data View is modified.

Luckily, there is a helper method on the Data View that can take care of that: method on the Data View to do a fast lexicographic search that is especially handy for older versions of IE.

If Allow Delete is false, an exception is thrown if you call the Delete method of the Data View or Data Row View. Allow Delete = False Dim new DRV As Data Row View = cust View. Allow Delete = false; Data Row View new DRV = cust View.

The following code example disables using the Data View to delete rows and adds a new row to the underlying table using the Data View. Tables("Customers") Dim cust View As Data View = cust Table. Add New() new DRV("Customer ID") = "ABCDE" new DRV("Company Name") = "ABC Products" new DRV. Tables["Customers"]; Data View cust View = cust Table. Add New(); new DRV["Customer ID"] = "ABCDE"; new DRV["Company Name"] = "ABC Products"; new DRV.

That is we can customize the views of data from a Data Table.

You can use the Data View to add, delete, or modify rows of data in the underlying table.

The ability to use the Data View to modify data in the underlying table is controlled by setting one of three Boolean properties of the Data View.

These properties are Allow New, Allow Edit, and Allow Delete. If Allow New is true, you can use the Add New method of the Data View to create a new Data Row View.

Since Data View can't automatically detect when you're changing the data, you'll need to make these updates via the Data View.

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