通过获取密钥词典值 [英] get dictionary value by key
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问题描述
我如何可以通过功能键得到字典值
How i can get the dictionary value by key on function
我的功能代码是这样的(和命令我做的尝试,但没有工作):
my function code is this ( and the command what i try but didnt work ):
static void XML_Array(Dictionary<string, string> Data_Array)
{
String xmlfile = Data_Array.TryGetValue("XML_File", out value);
}
我的按钮的代码是这样
my button code is this
private void button2_Click(object sender, EventArgs e)
{
Dictionary<string, string> Data_Array = new Dictionary<string, string>();
Data_Array.Add("XML_File", "Settings.xml");
XML_Array(Data_Array);
}
我想是这样的:
上XML_Array功能被
串XMLFILE =将Settings.xml
I want something like this:
on XML_Array function to be
string xmlfile = Settings.xml
推荐答案
这是如此简单:
String xmlfile = Data_Array["XML_File"];
请注意,如果字典中没有等于XML_FILE的关键
,该代码会抛出异常。如果你想先检查一下,你可以使用TryGetValue这样的:
Note that if the dictionary doesn't have a key that equals "XML_File"
, that code will throw an exception. If you want to check first, you can use TryGetValue like this:
string xmlfile;
if (!Data_Array.TryGetValue("XML_File", out xmlfile)) {
// the key isn't in the dictionary.
return; // or whatever you want to do
}
// xmlfile is now equal to the value
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