Listview items not clearing

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.NET2.0

Hello all,

I am using C#, .net 2.0;

I am taking input from user and storing and showing that using ListView Control. I need to provide Delete a row, Clear all Rows, Add a rows to this List view.

When user selects a row and clicks on Delete button selected rows will be deleted. When user clicks on clear button i need to Clear all the rows from List view.

I am using following code.

Problem :- When i use Delete, Clear button items are clearing from View only but not from listview instance. Which means when i am trying to access input from user it is showing along with previous results.

C#

private void btnClear_Click(object sender, EventArgs e)
       {
           try {
               if (lstViewCPTCompliance.Items.Count > 0)
               {
                   lstViewCPTCompliance.Items.Clear();
                   lstViewCPTCompliance.Update();
                   lstViewCPTCompliance.Refresh();
               }
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message.ToString());
           }
       }

       private void btnDelete_Click(object sender, EventArgs e)
       {
           try {
               for (int i = 0; i < lstViewCPTCompliance.Items.Count; i++)
               {
                   if (lstViewCPTCompliance.Items[i].Selected == true)
                   {
                       lstViewCPTCompliance.Items[i].Remove();
                       lstViewCPTCompliance.Update();
                       lstViewCPTCompliance.Refresh();
                   }

               }
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message.ToString());
           }
       }

Posted 6-Jul-16 2:48am

Charles Shob

Updated 6-Jul-16 19:56pm

Maciej Los

v2

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Comments

Member 12346239 6-Jul-16 9:32am

Are you want to clear/ delete all row from list instance ?

Charles Shob 6-Jul-16 9:50am

Yes.

Philippe Mori 6-Jul-16 15:11pm

Don't repeat same code twice.

Charles Shob 6-Jul-16 19:33pm

ok

1 solution

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Member 12346239 · Answer 1 · 2016-07-06T03:36:00

C#

private void btnClear_Click(object sender, EventArgs e)
       {
           try {
               for (int i = 0; i < lstViewCPTCompliance.Items.Count; i++)
               {                   
                       lstViewCPTCompliance.Items[i].Remove();
                       lstViewCPTCompliance.Update();
                       lstViewCPTCompliance.Refresh();
                  
               }
           }
        
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message.ToString());
           }
       }
 
       private void btnDelete_Click(object sender, EventArgs e)
       {
           try {
               for (int i = 0; i < lstViewCPTCompliance.Items.Count; i++)
               {
                   if (lstViewCPTCompliance.Items[i].Selected == true)
                   {
                       lstViewCPTCompliance.Items[i].Remove();
                       lstViewCPTCompliance.Update();
                       lstViewCPTCompliance.Refresh();
                   }
 
               }
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message.ToString());
           }
       }