如何使用C＃枚举值在JavaScript中 [英] How to use C# enumeration values in JavaScript

问题描述

我有在C＃即像Category.cs枚举。结果
在DropDownList中我们绑定值。结果
因此，如果用户在下拉列表中选择一些特定的值时，它会隐藏一个DIV。结果
所以我想在javascript中即要枚举值在JavaScript中一个选定的值进行比较的枚举值。

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.

马赫什

推荐答案

假设你有这样的枚举与数值：

Suppose you have such enum with numeric values:

public enum Colors
{
   Yellow = 1,
   Red,
   Blue,
   Green,
   Purple
}

首先，在后面的code（Page_Load事件）的JavaScript注册code，将建立持有相同的数据客户端结构：

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);

现在 arrColors 是与键和值JS变量的枚举。

Now arrColors is JS variable with both keys and values of your enum.

要使用它，有这样code，例如：

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>

和下拉应该是这样的：

<select onchange="SelectionChanged(this);">
    <option>Select..</option>
    <option value="Yellow">Yellow</option>
    <option value="Green">Green</option>
</select>

这篇关于如何使用C＃枚举值在JavaScript中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！