how to use generic list Received by generic function ?

Question

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

C#

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

passed
now i passed my generic list to the below function

C#

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

my problem is how to use data in function?

C#

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

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

C#

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

Posted 27-Sep-13 10:51am

aref.bozorgmehr

Updated 27-Sep-13 14:00pm

v2

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Comments

Zoltán Zörgő 27-Sep-13 17:13pm

It depends on what you want to do.

aref.bozorgmehr 27-Sep-13 19:42pm

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

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

2 solutions

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-09-27T11:15:00

Solution 1

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:

C#

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

—SA

Posted 27-Sep-13 11:15am

Sergey Alexandrovich Kryukov

Comments

aref.bozorgmehr 27-Sep-13 19:07pm

I know that, when i use your way and i get result from first.tostring() inseted data i have below result
mynamespace.a

Sergey Alexandrovich Kryukov 27-Sep-13 20:21pm

What's the problem them? And did you read on generics?
—SA

aref.bozorgmehr 27-Sep-13 20:31pm

yes i read generic but i want when i send List<class> 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"] = ID;
excelWorksheet.Cells[i + 1, "B"] = Name;
}

Sergey Alexandrovich Kryukov 27-Sep-13 21:32pm

And how is this related to generics and your question?
—SA

aref.bozorgmehr 27-Sep-13 21:49pm

i don't have problem with excel i want get data from function like my example but when i send data for function i don't know how can i receive that and use in a loop

JoCodes · Answer 2 · 2013-09-28T09:21:00

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

XML

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;
}
}

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