Hi Gabriele,
Unfortunately I couldn't replicate the issue at my end. Please have a look into the following sample code snippet which works fine at my end and let me know if you have any concern.
ASPX:
<telerik:RadComboBox ID="RadComboBox1" runat="server" EnableLoadOnDemand="true" DataTextField="Text"
DataValueField="Value" OnItemsRequested="RadComboBox1_ItemsRequested">
</telerik:RadComboBox>
C#:
protected void RadComboBox1_ItemsRequested(object sender, Telerik.Web.UI.RadComboBoxItemsRequestedEventArgs e)
{
Telerik.Web.UI.RadComboBox combo = (Telerik.Web.UI.RadComboBox)sender;
String connstring = WebConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString;
SqlConnection conn = new SqlConnection(connstring);
SqlDataAdapter adapter = new SqlDataAdapter();
adapter.SelectCommand = new SqlCommand("SELECT * from Customers WHERE CompanyName LIKE '" + e.Text + "%'", conn);
DataTable data = new DataTable();
conn.Open();
try
{
adapter.Fill(data);
}
finally
{
conn.Close();
}
foreach (DataRow row in data.Rows)
{
Telerik.Web.UI.RadComboBoxItem item = new Telerik.Web.UI.RadComboBoxItem(row["CompanyName"].ToString());
combo.Items.Add(item);
}
}
Thanks,
Shinu.