The simplest solution to the dropdownlist input problem in Asp.net

Put this js code in the HTML of your page.

 

Function catch_keydown (SEL) {Switch (event. keycode ){

Case 13: // enter;

Sel. Options [SEL. Length] = New Option ("", "", false, true );

Event. returnvalue = false;

Break;

Case 27: // ESC;

Alert ("text:" + SEL. Options [SEL. selectedindex]. Text + ", value:" + SEL. Options [SEL. selectedindex]. Value + ";");

Event. returnvalue = false;

Break;

Case 46: // Delete;

If (confirm ("exclude content before expiration !? ")){

Sel. Options [SEL. selectedindex] = NULL;

If (SEL. length> 0) {SEL. Options [0]. Selected = true ;}}

Event. returnvalue = false; break;

Case 8: // back space;

VaR S = SEL. Options [SEL. selectedindex]. text;

Sel. Options [SEL. selectedindex]. Text = S. substr (0, S. Length-1 );

Event. returnvalue = false; break ;}}

Function catch_press (SEL ){

Sel. Options [SEL. selectedindex]. Text = SEL. Options [SEL. selectedindex]. Text + String. fromcharcode

(Event. keycode); event. returnvalue = false;

}

Drag a dropdownlist control in your program and find the code of this control on the HTML page.

Add onkeydown = "catch_keydown (this);" onkeypress = "catch_press (this );"

Just run the program.