How to add value from checkedlistbox into database using stored procedure c# windows forms?

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i'm trying to add checked values from checkedlistbox using stored procedure and c#

C#

public static void CreateDrugsListBox(CheckedListBox DrugsList)
  {
      try
      {
          SqlConnection con = new SqlConnection(@"connection");
          SqlCommand cmd = new SqlCommand("InsertData_DrugsListBox", con);
          cmd.CommandType = CommandType.StoredProcedure;

          con.Open();
          foreach (string  itemchecked in DrugsList.CheckedItems)
          {
              cmd.Parameters.Clear();
              cmd.Parameters.AddWithValue("@DrugsValue", itemchecked);
              cmd.ExecuteNonQuery();

          }
          con.Close();
     }

      catch (Exception ex)
      {

          MessageBox.Show("Error"+ex, "Error", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);

      }

  }

it display an error like :

Quote:
errorSystem.invalidcastException: imposible to make a cast of an object type System.Data.DataRowView in type System.String

Posted 6-May-15 0:44am

Leila Toumi

Updated 6-May-15 0:56am

CHill60

v2

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John C Rayan · Accepted Answer · 2015-05-06T01:23:00

Solution 1

The problem is
foreach (string  itemchecked in DrugsList.CheckedItems)
What you need is
foreach (object  itemchecked in DrugsList.CheckedItems)
               {
                   DataRowView drv = itemChecked as DataRowView;
                   cmd.Parameters.Clear();
                   cmd.Parameters.AddWithValue("@DrugsValue", drv["DisplayMember or ValueMember"]);
                   cmd.ExecuteNonQuery();

Posted 6-May-15 1:23am

John C Rayan

Updated 6-May-15 1:25am

v4

Comments

Leila Toumi 6-May-15 7:33am

thanks for your reply. u tried but i got an error: DisplayMember /valueMember is not a DataColumn or a DataRelation for the table !!

John C Rayan 6-May-15 7:36am

Replace DisplayMember /valueMember with either your displaymember property column name or valueMember Column. Hope you understand.

Leila Toumi 6-May-15 9:28am

when i add my ValueMember which is "ID_Drugs" it works successfully but it insert only the list of the id, and when i add my displaymember which is "DrugsValue" i got the same error: DrugsValue is not a DataColumn or a DataRelation for the table. in my situation i need to insert the value of the checkedlistbox not the id

John C Rayan 6-May-15 10:01am

Can you post the code here where I can see your DisplayMember and ValueMember.

Leila Toumi 6-May-15 10:32am

Thanks @John C Rayan it works succesully now i just replace "DrugsValue" by "DrugsValues"

John C Rayan 6-May-15 11:07am

Please make sure that your marked the answer as accepted.