Binding modified data source to listview label RSS

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  athelli_redd...

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  Binding modified data source to listview label

  Apr 27, 2012 01:35 PM|LINK

  This is my .aspx page:

  <asp:ListView ID="ListView1" runat="server" DataSourceID="EntityDataSource1" OnItemDataBound="ListView1_ItemDataBound">
              
       <ItemTemplate>
             <asp:Label ID="DescriptionLabel" runat="server" Text='<%# Eval("Description") %>' />
           <asp:Label ID="DateDisplayLabel" ForeColor="Red" runat="server" Text='<%# Eval("InsertDate") %>' />
       </ItemTemplate>
  </ListView>
  
  

  This is my code:

  protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e) 
      {
          Label l = (Label)e.Item.FindControl("raj");
              
              if (l != null)
              {
                  using (OSEntities context1 = new OSEntities())
                  {
                      var vv = (from nInst in context1.OS select nInst.InsertDate).ToList();
                      var newList = new List<string>();
                      foreach (DateTime t in vv)
                      {
                          
                          String ss = GetPrettyDate(t);
                          newList.Add(ss);
                         
                      }
                      this.ListView1.DataSource = newList;
                      //HERE I WANT TO BIND DATA TO DateDisplayLabel like below
                      l.Text = ss;  --- But I am getting an error message. 
                      this.ListView1.DataBind();
  
                  }
              }
      }

  
  
  How should I bind data for "DateDisplayLabel" label from code instead of "InsertDate" database field. 

  I have modified this  "InsertDate" database field in my code and want to use the new modified value.

  can someone please help me?

  thanks in advance.

  databind listview

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  newbiefreak

  Member

  468 Points

  214 Posts

  Re: Binding modified data source to listview label

  Apr 27, 2012 01:47 PM|LINK

  you are getting error becuase you have declared ss variable in foreach loop and using ss variable out of function scope

  athelli_reddy

  foreach (DateTime t in vv)
                      {
                         
                          String ss = GetPrettyDate(t);
                          newList.Add(ss);
                         
                      }

  this.ListView1.DataSource = newList;
                      //HERE I WANT TO BIND DATA TO DateDisplayLabel like below
                      l.Text = ss;  --- But I am getting an error message.
                      this.ListView1.DataBind();
  

  just  declare string ss variable before foreach loop , and do this

  String ss = "";
  foreach (DateTime t in vv)
                      {
                          
                         ss = GetPrettyDate(t);
                          newList.Add(ss);
                         
                      }

  
  i hope this helps you

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  newbiefreak

  Member

  468 Points

  214 Posts

  Re: Binding modified data source to listview label

  Apr 27, 2012 01:55 PM|LINK

  and also change from

  Label l = (Label)e.Item.FindControl("raj");
  
  To

   Label l = (Label)e.Item.FindControl("DescriptionLabel");

  and you dont need to call databind in the item bound you obviously calling databind function when you had assigned datasource to listview e.g

  listview1.datasource = dt;
  listview1.databind();

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  athelli_redd...

  Member

  8 Points

  55 Posts

  Re: Binding modified data source to listview label

  Apr 27, 2012 02:06 PM|LINK

  Thanks Ahmed,

  now I am getting the following error message:

  "Data properties on data control 'ListView1' such as DataSource, DataSourceID, and DataMember cannot be changed during the databinding phase of the control"

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  newbiefreak

  Member

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  214 Posts

  Re: Binding modified data source to listview label

  Apr 27, 2012 02:13 PM|LINK

  remove

  this.listview1.databind();

  from itemdatabound function and try running again

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  athelli_redd...

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  55 Posts

  Re: Binding modified data source to listview label

  Apr 27, 2012 02:15 PM|LINK

  Hi Ahmed,

  I am still getting the same error message.

  I remoed this: this.listview1.databind();

  
  

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  athelli_redd...

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  55 Posts

  Re: Binding modified data source to listview label

  Apr 27, 2012 02:20 PM|LINK

  If i remove this as well: this.ListView1.DataSource = newList

  only last record is displaying in my label. 

  I have 20 records in my table but it is displaying only one value 20 times.

  How should I display all the value instead of same one 20 times

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  athelli_redd...

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  55 Posts

  Re: Binding modified data source to listview label

  Apr 27, 2012 02:27 PM|LINK

  It if displaying last record only when use:

  l.Text = ss;

  it is not working if write :

  l.Test = newList;

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  newbiefreak

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  214 Posts

  Re: Binding modified data source to listview label

  Apr 27, 2012 02:27 PM|LINK

  hi,

  also remove this.listview1.datasource line in the function

  you cant rebind or assign datasource to the same control like you are doing in listview1.itemdatabound

  can you describe your senerio  ?? if after removing datasource line in the function didnt helped u

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  newbiefreak

  Member

  468 Points

  214 Posts

  Re: Binding modified data source to listview label

  Apr 27, 2012 02:31 PM|LINK

  why dont you just append the string in the foreach loop

  like

  ss += "  " + GetPrettyDate(t);
  

  and

  label.text = ss;