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When working with datasource such as a database or a business object it is common to deal with null values. Null values can be an actual null (nothing in VB) or a database null value (DBNull.Value). When working with these values youll need to decide how you will display them. In addition there are valid reasons for when youll want to write a null value. Using the cell styles NullValue and DataSourceNullValue properties you can change how the DataGridView works with null values.
What is the DataGridView
Differences between the DataGridView and DataGrid controls
Highlight of features
Structure of DGV
Architecture Elements
Cells and Bands