ComponentOne FlexGrid for WinForms
ValidateEdit Event
Example 

C1.Win.C1FlexGrid Namespace > C1FlexGridBase Class : ValidateEdit Event
Fires before the control exits cell edit mode, while the editor is still active.
Syntax
'Declaration
 
Public Event ValidateEdit As ValidateEditEventHandler
public event ValidateEditEventHandler ValidateEdit
Event Data

The event handler receives an argument of type ValidateEditEventArgs containing data related to this event. The following ValidateEditEventArgs properties provide information specific to this event.

PropertyDescription
Gets or sets a value indicating whether the edit operation should be canceled.  
If the cell contains a checkbox, the new checkbox state about to be applied to the cell.  
Gets the column index of the cell being edited.  
Gets the row index of the cell being edited.  
Remarks

When this event fires, the contents of the editor have not been applied to the grid. You can validate the editor contents and cancel the edits if necessary.

To validate the editor contents, check the value contained in the Editor.Text property. If the value is invalid for the cell, set the Cancel parameter to true and the grid will remain in edit mode until the user types a valid entry.

For example, the code below checks to make sure the value entered is an integer between 0 and 100: void _flex_ValidateEdit(object sender, ValidateEditEventArgs e) { if (_flex.Cols[e.Col].Name = "Score") { try { int value = int.Parse(_flex.Editor.Text); if (value >= 0 && value <= 50) return; // accept edits } catch {} // error or invalid range, refuse edits e.Cancel = true; } }
Example
For example, the code below checks to make sure the value entered is an integer between 0 and 100:
void _flex_ValidateEdit(object sender, ValidateEditEventArgs e)
{
    if (_flex.Cols[e.Col].Name = "Score")
    {
        try
        {
            int value = int.Parse(_flex.Editor.Text);
            if (value >= 0 && value <= 50)
                return; // accept edits
        }
        catch {}
    
        // error or invalid range, refuse edits
        e.Cancel = true;
    }
}
See Also