The error message appears when opening the custom option from the filter icon in RadGridView.
The error message should not appear as there is a text in the textbox. When the enter key is pressed, the textbox value is still not committed which leads to this error. As a workaround, we can create a custom CompositeDataFilterForm override the ProcessCmdKey where we can handle this case.
public class MyCompositeDataFilterForm : CompositeDataFilterForm
{
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if(keyData == Keys.Enter)
{
this.Controls[2] as RadButton).Focus();
(this.Controls[2] as RadButton).PerformClick();
}
return base.ProcessCmdKey(ref msg, keyData);
}
}
private void RadGridView1_CreateCompositeFilterDialog(object sender, GridViewCreateCompositeFilterDialogEventArgs e)
{
var newForm = new MyCompositeDataFilterForm();
e.Dialog = newForm;
}
When setting the DataFilter.Expression property to an expression that contains negative values, the DataFilter ignores that condition.
Please refer to the attached sample project.
Workaround:To reproduce: I want to add multiple items to a filter expression using the Is in list operator. It seems it is space delimited. For example, I want to filter for 'In Progress' and 'Late'. However, when I apply the filter it creates this 'In', 'Progress', and 'Late'. Workaround: Currently, the possible solution that I can suggest is to use underscores to separate the words , e.g. "In_Progress".
To reproduce: set the DataSource property and enable the sorting for the fields drop-down items: Me.RadDataFilter1.SortOrder = SortOrder.Descending Me.RadDataFilter1.SortFieldNames = True When you activate the drop-down editor to select a field name, you will notice that the items are always sorted ascending no matter the SortOrder. Note: RadDataFilter should allow you to sort the drop-down items in descending order. Workaround: Private Sub RadForm1_Load(sender As Object, e As EventArgs) Handles MyBase.Load AddHandler Me.RadDataFilter1.EditorInitialized, AddressOf EditorInitialized End Sub Private Sub EditorInitialized(sender As Object, e As Telerik.WinControls.UI.TreeNodeEditorInitializedEventArgs) Dim editor As TreeViewDropDownListEditor = TryCast(e.Editor, TreeViewDropDownListEditor) If editor IsNot Nothing Then Dim element As BaseDropDownListEditorElement = TryCast(editor.EditorElement, BaseDropDownListEditorElement) element.ListElement.SortStyle = Telerik.WinControls.Enumerations.SortStyle.Descending End If End Sub
Please refer to the attached screenshot illustrating what filter expressions and groups are added. As a result, an incorrect RadDataFilter.Expression is produced. RadDataFilter either must always contain a valid expression or indicates somehow when the current expression is not valid.