Append Loop Variable to Variable Name

Question

I have 5 DataTables that needs to be converted to TXT files. Instead of creating them separately, I thought I use a for loop. Here\'s my code:

Strin         


        

Answer 1

You cannot just append a number to a variable name at runtime to magically reference a new variable. What you should do instead is:

Define an an interface:

public interface IFileBLO
{
    DataTable SelectFileForCSV();
}

Have File1BLO, File2BLO etc all implement IFileBLO and fix the method names so that they are all SelectFileForCSV rather than SelectFile1ForCSV etc.

Add a lookup for reference these objects:

var bloList = new IFileBLO[]
{
    file1BLO, file2BLO, file3BLO, file4BLO, file5BLO
};

Finally, change your loop to:

for (int i = 0; i < 5; i++)
{
    var dtFile = bloList[i].SelectFileForCSV();
    foreach (var dr in dtFile.Rows)
    {
        ...