Control::TextChanged Event
.NET Framework (current version)
Occurs when the Text property value changes.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
This event is raised if the Text property is changed by either a programmatic modification or user interaction.
For more information about handling events, see Handling and Raising Events.
The following code example changes the ForeColor of a TextBox displaying currency data. The example converts the text to a decimal number and changes the ForeColor to Color::Red if the number is negative and to Color::Black if the number is positive. This example requires that you have a Form that contains a TextBox.
private: void currencyTextBox_TextChanged( Object^ /*sender*/, EventArgs^ /*e*/ ) { try { // Convert the text to a Double and determine if it is a negative number. if ( Double::Parse( currencyTextBox->Text ) < 0 ) { // If the number is negative, display it in Red. currencyTextBox->ForeColor = Color::Red; } else { // If the number is not negative, display it in Black. currencyTextBox->ForeColor = Color::Black; } } catch ( Exception^ ) { // If there is an error, display the text using the system colors. currencyTextBox->ForeColor = SystemColors::ControlText; } }
.NET Framework
Available since 1.1
Available since 1.1
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