Can I add row data with a for loop

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I tried using the below code (for loop) to add rows to a datatable. The debugger shows the datatable row count increments; but the row list never populates. Am I creating some sort of scope issue with the for loop?

C#

myTable.Columns.Add("Item1", typeof(int)); // set fixed number columns
myTable.Columns.Add("Item2", typeof(int));
myTable.Columns.Add("Item3", typeof(int));
                       
  for (int i = 0; i < numItems; i++)
  {
    DataRow myRow = myTable.NewRow();

    line = sr.ReadLine();
    subLine = line.Substring(line.LastIndexOf("= ") + 2); // find value

    myRow["Item1"] = int.Parse(subLine,System.Globalization.NumberStyles.Any);     

    myTable.Rows.Add( myRow );            // add row object to the table

What I have tried:

I've tried declaring the NewRow object inside and outside the for loop. Outside i see an exception thrown.

Posted 22-Jan-17 8:23am

OldPCGuy

Updated 22-Jan-17 11:02am

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Comments

Kornfeld Eliyahu Peter 22-Jan-17 14:32pm

At first glance your code seems all right... Please review it using this: https://msdn.microsoft.com/en-us/library/system.data.datatable.newrow(v=vs.110).aspx

[no name] 22-Jan-17 15:32pm

It's probably not populating because you are using Substring incorrectly. Using the debugger would tell you what is wrong.

Kornfeld Eliyahu Peter 23-Jan-17 3:15am

1. If you post your comments as solution you actually close your own question. It moves from unanswered to answered I gets less attention
2. The messages you posted here are irrelevant - those are status messages of the DLL loader
3. You are talking about 'list members' - what list? Maybe your problem is around the binding and not the new rows? Show the relevant code, so someone would check it

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OldPCGuy · Answer 1 · 2017-01-22T11:02:00

I don't think the Substring line is it. It seems to load the int into the row object without error. Just to be sure I commented it out and replaced with the following;

C#

subLine = "123";

I get the same result, row counts and still no list members.

The debug widow list a lot of the following;

'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.

Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Numerics\v4.0_4.0.0.0__b77a5c561934e089\System.Numerics.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.

I'm assuming these are status messages??