How to display value of selected items in combobox into given text box

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I want if selected items in the combo box where the value of combo box item is queried by database, the result of selected item in combo box will show in text box

What I have tried:

/* code get data from access db into combo box */

C#

private void GetProductsName()
      {
          try
          {
              OleDbConnection conn = new OleDbConnection();
              conn.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\xxx\Documents\RetailDatabse.accdb;Persist Security Info=False";
              conn.Open();

              OleDbCommand cmd = new OleDbCommand();
              cmd.Connection = conn;
              cmd.CommandText = "SELECT ProductName, ProductPrice FROM Products";
              OleDbDataReader reader = cmd.ExecuteReader();
              while (reader.Read())
              {
                  ItemNamecomboBox.Items.Add(reader["ProductPrice"].ToString() + "  " + reader["ProductName"].ToString());
                  //ItemNamecomboBox.Items.Add(reader["ProductPrice"].ToString());

              }

              conn.Close();
          }
          catch (Exception ex)
          {
              MessageBox.Show("Error query" + ex);
          }
      }

/* showing data from selected combo box that get error */

C#

private void ItemNamecomboBox_SelectedValueChanged(object sender, EventArgs e)
       {

           decimal productPrice = Convert.ToDecimal(ItemNamecomboBox.SelectedValue);
           UnitPricetextBox.Text = productPrice.ToString();

       }

Posted 7-Oct-16 16:10pm

Member 10195910

Updated 7-Oct-16 16:55pm

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Karthik_Mahalingam · Answer 1 · 2016-10-07T16:55:00

Solution 1

try this

C#

ItemNamecomboBox.DisplayMember = "Text";
            ItemNamecomboBox.ValueMember = "Value";
            while (reader.Read())
            {
                ItemNamecomboBox.Items.Add(new { Text = reader["ProductPrice"].ToString() + "  " + reader["ProductName"].ToString(), Value = reader["ProductPrice"].ToString() });
            }

C#

private void ItemNamecomboBox_SelectedValueChanged(object sender, EventArgs e)
       {
           dynamic item = ItemNamecomboBox.SelectedItem;
           if (item != null)
           {
               string price = item.Value;
           }
       }

Posted 7-Oct-16 16:55pm

Karthik_Mahalingam

Comments

Member 10195910 8-Oct-16 18:26pm

Hi, your solution is still gets any error for below code
private void ItemNamecomboBox_SelectedValueChanged(object sender, EventArgs e)
{
dynamic item = ItemNamecomboBox.SelectedItem;

if (item != null)
{
string price = item.Value; // the one get error
UnitPricetextBox.Text = price;

}
}

Error Output :
RuntimeBindeException was unhandled
<>fAnonymousType0

Karthik_Mahalingam 9-Oct-16 0:36am

make sure these 2 lines are declared before the loop
ItemNamecomboBox.DisplayMember = "Text";
ItemNamecomboBox.ValueMember = "Value";