Asp.net move the cursor in textbox to the text of the current input

We often encounter some problems, that is, to move the cursor in the textbox to the text currently entered. Next I will introduce you to the summary of how to move the cursor to the text currently entered.

When I write a winform application today, I want to write a text box similar to the amount input by the bank, that is, when the user enters the full number of digits, an identifier such as a comma is automatically added to the end, character judgment is well implemented in TextChanged, but the problem is that when I judge that the input is full 8 digits, a comma is automatically added, however, the cursor of the text box will run to the starting position of the text box, which is inconvenient. So I found some solutions. The Code is as follows:

The Code is as follows:	Copy code
Private void textBox9_TextChanged_1 (object sender, EventArgs e) { If (textBox9.Text. Length = 8 * (I + 1) + I) { TextBox9.Text + = ","; I ++; TextBox9.SelectionStart = int. MaxValue; } }

You can use the selectionstart attribute of textbox to set the cursor position.

Js Code

GetCursortPosition and setCursorPosition functions in mainstream browsers such as IE, Firefox, and Opera.

The Code is as follows:

Copy code

Function getCursortPosition (ctrl) {// obtain the cursor position function Var CaretPos = 0; // IE Support If (document. selection ){ Ctrl. focus (); Var Sel = document. selection. createRange (); Sel. moveStart ('character ',-ctrl. value. length ); CaretPos = Sel. text. length; } // Firefox support Else if (ctrl. selectionStart | ctrl. selectionStart = '0 ') CaretPos = ctrl. selectionStart; Return (CaretPos ); }

PS: ctrl is the input or textarea object.

The Code is as follows:	Copy code
Function setCaretPosition (ctrl, pos) {// set the cursor position function If (ctrl. setSelectionRange) { Ctrl. focus (); Ctrl. setSelectionRange (pos, pos ); } Else if (ctrl. createTextRange ){ Var range = ctrl. createTextRange (); Range. collapse (true ); Range. moveEnd ('character ', pos ); Range. moveStart ('character ', pos ); Range. select (); } }

PS: ctrl is the input or textarea object, and pos is the position to move the cursor