DataGridViewCellValueEventArgs Class
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DataGridViewCellValueEventArgs Class


Provides data for the CellValueNeeded and CellValuePushed events of the DataGridView control.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)


public class DataGridViewCellValueEventArgs : EventArgs

System_CAPS_pubmethodDataGridViewCellValueEventArgs(Int32, Int32)

Initializes a new instance of the DataGridViewCellValueEventArgs class.


Gets a value indicating the column index of the cell that the event occurs for.


Gets a value indicating the row index of the cell that the event occurs for.


Gets or sets the value of the cell that the event occurs for.


Determines whether the specified object is equal to the current object.(Inherited from Object.)


Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)


Serves as the default hash function. (Inherited from Object.)


Gets the Type of the current instance.(Inherited from Object.)


Creates a shallow copy of the current Object.(Inherited from Object.)


Returns a string that represents the current object.(Inherited from Object.)

Handle the CellValueNeeded and CellValuePushed events to implement virtual mode in the DataGridView control. For more information about virtual mode, see Virtual Mode in the Windows Forms DataGridView Control.

For more information about handling events, see NIB: Consuming Events.

The following code example handles the CellValuePushed event to store updates and new entries in a data store object. This example is part of a larger example available in the DataGridView.VirtualMode reference topic.

#region "data store maintance"
const int initialValue = -1;

private void dataGridView1_CellValueNeeded(object sender,
    DataGridViewCellValueEventArgs e)
    if (store.ContainsKey(e.RowIndex))
        // Use the store if the e value has been modified 
        // and stored.            
        e.Value = store[e.RowIndex];
    else if (newRowNeeded && e.RowIndex == numberOfRows)
        if (dataGridView1.IsCurrentCellInEditMode)
            e.Value = initialValue;
            // Show a blank value if the cursor is just resting
            // on the last row.
            e.Value = String.Empty;
        e.Value = e.RowIndex;

private void dataGridView1_CellValuePushed(object sender,
    DataGridViewCellValueEventArgs e)
    store.Add(e.RowIndex, int.Parse(e.Value.ToString()));

private Dictionary<int, int> store = new Dictionary<int, int>();

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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