string to int problem

1. int x = Int32.Parse(TextBoxD1.Text);  

or better yet:

Also, since Int32.TryParse returns a bool you can use its return value to make decisions about the results of the parsing attempt:

If you are curious, the difference between Parse and TryParse is best summed up like this:

1. int? countArmyNC = 0;  
2. foreach (DataGridViewRow row in dataGridView1APen.Rows)  
3. {  
4. if (row.Cells[4].Value.ToString() == "‡mbv evwnbx (bb KwgkÛ)")  
5. {  
6. countArmyNC++;  
7. }  
8. else  
9. {  
10. countArmyNC = null;  
11. }  
12. }  

1. int countArmyNC = 0;   
2. foreach (DataGridViewRow row in dataGridView1APen.Rows)   
3. {   
4. if (row.Cells[4].Value.ToString() == "‡mbv evwnbx (bb KwgkÛ)")   
5. {  
6.  countArmyNC++;  
7.  }  
8.  else  
9.  {   
10. countArmyNC =0  
11.  }  
12. }