Question

I am a student programer working in Visual Studios C# and I am trying to access information from my dataset and insert the data into a class. This is not, by any means, homework I’ve just have some personal projects I’ve been wanting to try. I have tried several approaches that have been mentioned on this site; however, no information is displayed. My code looks similar to this:

class MyClass
{
    public string ColumnData1
    {
        get; set;
    }
    public int ColumnData2
    {
        get; set;
    }
    public string Display()
    {
        string MyString = ColumnData1 + ColumnData2.ToString();
        return MyString;
    }
}

I use this to insert data into class:

private void MyForm_Load(object sender, EventArgs e)
{
    MyDataSet.MyDataTable MDT = new MyDataSet.MyDataTable();

    List<MyClass> MyList = new List<MyClass>();

    foreach (DataRow MyDataRow in MDT.Rows)
    {
        Mylist.Add(new MyClass()
                   {
                       ColumnData1 = (string)MyDataRow["Data1"],
                       ColumnData2 = (int)MyDataRow["Data2"]
                   {
    }

Lastly to display the information:

    textBox1.Text = Mylist[0].Display();
}

In the end, however, nothing ends up displaying. This also wasn’t the only thing I’ve tried to display the information.. it’s like the information doesn’t exist. I don’t receive any errors and when I try to add a “Stop Point” at the insertion part of the code it just skips it. I should mention also that I have many text boxes and list boxes that pull data off the database just fine, of course Visual Studios binds those for me. Any help is very much appreciated.

Edit:
Ok, excluding the new data table. If I had an existing dataset how would I would I use it to fill my class.

Answer 1

That’s normal because your DataTable is empty (Your create instance)

MyDataSet.MyDataTable MDT = new MyDataSet.MyDataTable();//<------Empty


foreach (DataRow MyDataRow in MDT.Rows)
{
  ....
}

Fill DataSet :

string queryString = 
  "SELECT .... FROM YourTable";
SqlDataAdapter adapter = new SqlDataAdapter(queryString, connection);

DataSet dataSet = new DataSet();
adapter.Fill(dataSet, "NameOfDataSet");