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Hello All,
I am trying to bind the value that is coming in list object to Listbox but on debug it is showing value but when form loads listbox is empty. I am trying to create a IE BHO in which i want to load all the words that are available in excelsheet file name DictionaryFile. Below is my code:

Please help me out, thanking you all

private void Form1_Load(object sender, EventArgs e)
       {
          // provider = (CodeDomProvider)Activator.CreateInstance("Microsoft.JScript", "Microsoft.JScript.JScriptCodeProvider").Unwrap();
           if (istrue == false)
           {
               LoadAllWord();
           }
       }

       private void LoadAllWord()
       {
           istrue = true;
           OleDbConnection objConn = null;
           //Passing Query String and Ole connection object to Ole DB Command
           OleDbCommand cmd = new OleDbCommand();
           //Declaring OleDbDataAdapter object which execute the OleDbCommand in next line.
           OleDbDataAdapter oleda = new OleDbDataAdapter();
           //Creating Query String
           string querystr = "";
           //Declaring new Data table with dt object
           DataTable dt = new DataTable();
           DataSet ds = new DataSet();
           try
           {

               string FileName = System.Environment.GetFolderPath(System.Environment.SpecialFolder.ProgramFilesX86) + "\\Dictionary\\Dictionary.xls";
               //Creating Connection String
               String connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source= " + FileName + " ;Persist Security Info=False;Extended Properties=Excel 8.0;";
               //Passing Connection String Value into Ole Connection Object
               objConn = new OleDbConnection(connString);
               //Connection is getting open from here
               objConn.Open();
               //Creating Query String
              // querystr = @"SELECT *  from [DictionaryFile$] where CHECK_DIGIT > 0";// Record_Level < 501 and
               querystr = @"SELECT *  from [DictionaryFile$]";// Record_Level < 501 and
               //querystr
               //Passing Query String and Ole connection object to Ole DB Command
               cmd = new OleDbCommand(querystr, objConn);
               //Passing Command Value to OldDbDataAdapter object
               oleda.SelectCommand = cmd;
               // Filling OleDataAdapter value in DataTable Object dt
               oleda.Fill(dt);
               //oleda.Fill(ds);

               List<string> lst = new List<string>();
               foreach (DataRow r in dt.Rows)
               {
                   //lst.Add(r["words"].ToString());
                   lstInstalledWord.Items.Add(r["words"].ToString());
               }

              // lstInstalledWord.Items.Clear();
               //lstInstalledWord.DisplayMember = "words";
               //lstInstalledWord.ValueMember = "words";
               //lstInstalledWord.DataSource = lst;
               //lstInstalledWord.DisplayMember = "words";
               //lstInstalledWord.DataSource = ds.Tables["words"];


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

           //lstInstalledWord.DataSource = dt;//DataSource to GrigView(Id:gvOne)
       }
Posted

1 solution

Based on few comments words (querystring, gridview, etc), I assume you are working on a web application and it's an ASP.NET app code.

If so, you need to bind the items once defined to the list.
Post fetching the values, do:
C#
oleda.SelectCommand = cmd;
oleda.Fill(dt);
lstInstalledWord.Items.Clear();
lstInstalledWord.DataSource = dt;
lstInstalledWord.DisplayMember = "words";
lstInstalledWord.ValueMember = "words";
lstInstalledWord.DataBind();

Once you define the datasource, you need to bind too. Try!
 
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