如何在 JavaScript 中使用 C# 枚举值
声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow
原文地址: http://stackoverflow.com/questions/5537271/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to use C# enumeration values in JavaScript
提问by Mahesh KP
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.
我在 C# 中得到了一个枚举,即类似于 Category.cs 的东西。
在下拉列表中,我们正在绑定值。
因此,如果用户在下拉列表中选择某个特定值,它将隐藏一个 div。
所以我想在 javascript 中获取枚举值,即想将枚举值与 javascript 中的一个选定值进行比较。
Mahesh
马赫什
采纳答案by Shadow Wizard is Ear For You
Suppose you have such enum
with numeric values:
假设你有这样enum
的数值:
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:
首先,在后面的代码(Page_Load 事件)中注册将构建保存相同数据的客户端结构的 JavaScript 代码:
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
.
现在arrColors
是带有键和值的 JS 变量enum
。
To use it, have such code for example:
要使用它,例如有这样的代码:
<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:
下拉菜单应如下所示:
<select onchange="SelectionChanged(this);">
<option>Select..</option>
<option value="Yellow">Yellow</option>
<option value="Green">Green</option>
</select>
回答by Bogdan Verbenets
System.Enum.GetNames(typeof(yourenumerationtype))
- returns an array of strings, which represents enumeration items' names
System.Enum.GetNames(typeof(yourenumerationtype))
- 返回一个字符串数组,表示枚举项的名称