This is a migrated thread and some comments may be shown as answers.

[Solved] List of items show up twice in ComboBox

4 Answers 527 Views

ComboBox

This is a migrated thread and some comments may be shown as answers.

Amanda asked on 30 May 2008, 05:46 PM

Hi,

I am having trouble with a RadComboBox that is part of an edit form within a RadGrid. I am trying to bind a list of items that comes out of a data access layer, but before I bind, I want to add a "Please select a value"-type row as the first row. I have successfully done this with other forms in my application by first clearing the rows, adding the "please select" row, and then setting .AppendDataBoundItems = true, but I am having trouble this time. If I remove the two lines that create the new row and set .AppendDataBoundItems = true, the list of values is NOT doubled.

I am using a function to do this, since I have to do the same action on a number of identical comboboxes with individual labels. I have verified that my function is only being called once per combobox. Here is my code:

    
            private void populateAccountControls(GridItemEventArgs e, string labelName, string comboBoxName, string itemName)  
        
                {  
        
                    RadComboBox mySelect = (RadComboBox)e.Item.FindControl(comboBoxName);  
        
                    Label myLabel = (Label)e.Item.FindControl(labelName);  
        
                    if (myLabel != null && mySelect != null)  
        
                    {  
        
                        mySelect.Items.Clear();  
        
                        if (itemName!= string.Empty)  
        
                        {  
        
                            myLabel.Text = itemName;  
        
                            myLabel.Visible = true;  
        
                            mySelect.Visible = true;  
        
                            mySelect.Items.Insert(0, new RadComboBoxItem("- Please select an account -", "-1"));  
        
                            mySelect.AppendDataBoundItems = true;  
        
                            DataTable accountList = new DataTable();  
        
                            accountList = Accounts.GetAccounts(itemName);  
        
                            mySelect.DataTextField = "AccountName";  
        
                            mySelect.DataValueField = "AccountID";  
        
                            mySelect.DataSource = accountList;  
        
                            mySelect.DataBind();  
        
                        }  
        
                        else 
        
                        {  
        
                            myLabel.Visible = false;  
        
                            mySelect.Visible = false;  
        
                        }  
        
                    }  
        
                }

If I comment out lines 16 and 17, the combobox behaves appropriately.

4 Answers, 1 is accepted

Accepted