I have got an enumeration in C# ie something like Category.cs.
In a dropdownlist we are binding values.
So if the user selects some specific value in dropdown it will hide one div.
So i want to get the enumeration value in javascript ie want to compare the enumeration value with one selected value in javascript.
Mahesh
Suppose you have such enum with numeric values:
public enum Colors
{
Yellow = 1,
Red,
Blue,
Green,
Purple
}
First of all, in the code behind (Page_Load event) register JavaScript code that will build client side structure that hold the same data:
string strJS = string.Format("var arrColors = {{{0}}}; ",
string.Join(", ", Enum.GetNames(typeof(Colors)).ToList().ConvertAll(key =>
{
return string.Format("{0}: {1}", key, (int)((Colors)Enum.Parse(typeof(Colors), key)));
}).ToArray()));
Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "enum", strJS, true);
Now arrColors is JS variable with both keys and values of your enum.
To use it, have such code for example:
<script type="text/javascript">
function SelectionChanged(oDDL) {
var selectedValue = oDDL.value;
var enumValue = arrColors[selectedValue] || "N/A";
alert("enum value for '" + selectedValue + "' is: " + enumValue);
}
</script>
And the drop down should look like this:
<select onchange="SelectionChanged(this);">
<option>Select..</option>
<option value="Yellow">Yellow</option>
<option value="Green">Green</option>
</select>
System.Enum.GetNames(typeof(yourenumerationtype)) - returns an array of strings, which represents enumeration items' names
