CurrentCell与使用SelectedRows属性的所选单元格不同，并从那里访问用户名列。

这有效：

  private  无效对接on5_Click（ object  sender，EventArgs e）
 {
 string  tempusername; 
 if （log_InDataGridView.Rows.Count >   1 ）
 {
 if （log_InDataGridView.Rows [log_InDataGridView.CurrentRow.Index] .IsNewRow！=  true ）
 {
 tempusername = log_InDataGridView.CurrentRow.Cells [ 0 ] .Value.ToString（ ）.Trim（）ToLower将（）; 
 username = username.Trim（）。ToLower（）; 
 if （tempusername.Equals（username）==  true ）
 {
 MessageBox.Show（ 无法删除当前用户）; 
} 
 else  
 this  .log_InBindingSource.RemoveCurrent（）; 
} 
} 
 else  
 MessageBox.Show（ 请先选择要删除的用户）; 
} 

I have a data table contains username and password and type, and a gridview to edit users. Now when I click the delete user button I want it to check if the current user name and selected rows user name is same or not. I have a string called kullaniciadi where I keep last loged in username from textbox1.text like this:

kullaniciadi = UserNametextBox1.Text;

And I tryed this but well it doesn't work for apearently obvious reasons couse I couldn't find anything on the internet about this:

if ( log_InDataGridView.CurrentCell.Value.ToString == kullaniciadi)
                    MessageBox.Show ( "Cannot delete currently loged in user" );

How can I do this?
Thanx.

The CurrentCell is not the same as the selected cell- try using the SelectedRows property instead and access the username column from there.

This worked:

private void button5_Click ( object sender , EventArgs e )
                {
                string tempusername;
                if ( log_InDataGridView.Rows.Count > 1 )
                    {
                    if ( log_InDataGridView.Rows [ log_InDataGridView.CurrentRow.Index ].IsNewRow != true )
                        {
                            tempusername= log_InDataGridView.CurrentRow.Cells [ 0 ].Value.ToString ().Trim().ToLower();
                            username= username.Trim ().ToLower ();
                            if( tempusername.Equals(username)==true)
                                {
                                    MessageBox.Show ( "Cannot delete currently loged in user" );
                                }
                            else
                                this.log_InBindingSource.RemoveCurrent ();
                        }
                    }
                else
                    MessageBox.Show ( "Please select a user to delete first" );
                }