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Inserting text into textbox at cursor position

Posted on 2009-05-13
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Last Modified: 2013-11-08
In the simplest terms I have a button and a multiline textbox on my asp.net page. I type data into the textbox and when I click a button I need it to insert text at the cursor position.

This is also within an updatepanel. Is this possible?
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Question by:syinner
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by:MaxOvrdrv2
ID: 24374787
can you use client-side script (JavaScript) or you are limited to server-side?
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by:syinner
ID: 24374838
i got no problem using client side however this is within a control that is part of a content page... i have had problems with client side javascript when this is combined with an updatepanel.

i would like the server side to make the decision what needs to inserted through.
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MaxOvrdrv2 earned 500 total points
ID: 24374912
the problem is that you cannot get the current cursor location from a textbox using server-side code... unless you are certain that the location will be either the beginning, or end of the text entered...  here's the JavaScript way of inserting text at the cursor location... this also gives you a selected text if you need it... use @pos@ var for current position:
function InsertAtLocation()
{
  var ctrl = 
 document.getElementById("<%=Me.TextBoxName.ClientID%>");
  var saveText = ctrl.value;
  ctrl.focus();
  var range = document.selection.createRange();
  var specialchar = String.fromCharCode(1);
  range.text = specialchar;
  var pos = ctrl.value.indexOf(specialchar);
  ctrl.value = saveText;
  range = ctrl.createTextRange();
  range.move('character', pos);
  range.select();
  range.text = "INSERT YOUR TEXT HERE, USING <%=%> IF NEEDED"
  document.getElementById("txtTargetText").focus();
  window.event.returnValue = false;
}

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Expert Comment

by:MaxOvrdrv2
ID: 24374921
something like that anyway... for mine here i'm copying text from one text box to another... but you get the idea from the code anyway.
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