如何使用泛型列表通用函数接收？ [英] how to use generic list Received by generic function ?

问题描述

我有一个有两个属性的类，我用linq查询填写

i have a class with two property and i fill that with linq query

public class a
{
    public int ID { set; get; }
    public string Name { set; get; }
}

通过

现在我将我的通用列表传递给下面的函数

passed
now i passed my generic list to the below function

List<a> a1 = new List<a>();
a1 = (from p in context.TblTest select new a { ID = p.ID, Name = p.Name }).ToList();
TestFunction(a1);

我的问题是如何在函数中使用数据？

my problem is how to use data in function?

static public void WriteToFile<T>(List<T> YourList)
{
 //here 
// how to use ?
}

i当我发送List< anyclass>这个函数将函数写入excel文件

像这样

i want when i send List<anyclass> to this function the function writ data to excel file
like this

for (int i = 0; i < YourList.count(); i++) excelWorksheet.Cells[i + 1, "A"] = //here what can i to do ;

推荐答案

你只需阅读泛型;只有一个答案对你没什么帮助： http://msdn.microsoft.com/en-us/ library / 512aeb7t.aspx [ ^ ]。



在你的情况下，看看这个：

You just need to read on generics; just one answer won't help you much: http://msdn.microsoft.com/en-us/library/512aeb7t.aspx[^].

In your case, look at this:

static public void WriteToFile<T>(List<T> yourList)
{
    if (yourList == null) return;
    if (yourList.Count < 1) return;
    T first = yourList[0]; // look here
    //...
}

-SA

我想你只想迭代基于for循环的列表项索引

I think you just want to iterate through the list items index based in for loop

static public void WriteToFile<T>(List<T> YourList)
{
for (int i = 0; i < YourList.count(); i++) 

{

   excelWorksheet.Cells[i + 1, "A"] = yourList[i].ID;

   excelWorksheet.Cells[i + 1, "B"] = yourList[i].Name;

}

}

或者应该使用foreach语句如



foreach（你的列表中的var项目）

{

//你应该增加我

excelWorksheet.Cells [i + 1，A] = item.ID;

}



希望这有帮助

Or should be using foreach statement like

foreach(var item in yourList)
{
// you should increment i
excelWorksheet.Cells[i + 1, "A"] = item.ID;
}

Hope this helps

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