The Javascript decodeURIComponent() function decodes a string that was URI encoded with the encodeURIComponent() Javascript function. If you wish to encode a string in C# that can be decoded with decodeURIComponent you have to use the EscapeDataString function:
System.Uri.EscapeDataString("This is my text");
The escaping an unescaping of strings can for example be used to add HTML strings to a Javascript array from C#. Adding HTML strings to an array using the ClientScript.RegisterArrayDeclaration() function will produce an error when the page is executed. But if you encode/decode the strings, the function will succeed:
protected void Page_Load(object sender, EventArgs e)
{
StringBuilder sb = new StringBuilder();
sb.AppendFormat("\"{0}\"", Uri.EscapeDataString("
<h1>This is my first heading</h1>
"));
sb.AppendFormat("\"{0}\"", Uri.EscapeDataString("
<h2>This is my second heading</h2>
"));
sb.AppendFormat("\"{0}\"", Uri.EscapeDataString("
<h3>This is my third heading</h3>
"));
Page.ClientScript.RegisterArrayDeclaration("myArray", sb.ToString());
}
This function appends 3 HTML strings to an array and adds the array to the page. The strings are now accessible from Javascript. This pseudo function will take an ID of a DIV tag and the index of the array and output the text from the above created array in the DIV tag:
<script language="javascript" type="text/javascript">
function ShowDescription(divID, index)
{
var divTag = document.getElementById(divID);
divTag.innerHTML = decodeURIComponent( myArray[index] );
}
</script>
