In this case, the culture of the application is different from the culture of the machine. In this particular case, both cultures have different long date time format strings. current format mm/dd/yyyy compare to the one which the control is loading dd/mm/yyyy.
As a workaround, we can apply InvariantCulture before loading the XML and return the previous one after this:
CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
grid.LoadLayout(xml);
CultureInfo.CurrentCulture = CultureInfo.GetCultureInfo("en-US");
To reproduce:
public RadForm1()
{
InitializeComponent();
PopulateGrid();
}
private void radButton1_Click(object sender, EventArgs e)
{
GridViewSpreadExport spreadExporter = new GridViewSpreadExport(this.radGridView1);
SpreadExpo
rtRenderer exportRenderer = new SpreadExportRenderer();
spreadExporter.ExportHierarchy = true;
spreadExporter.ExportVisualSettings = true;
spreadExporter.ChildViewExportMode = Telerik.WinControls.UI.Export.ChildViewExportMode.ExportAllViews;
string fileName = @"..\..\exportedFile" + DateTime.Now.ToLongTimeString().Replace(":", "_") + ".xlsx";
spreadExporter.RunExport(fileName, exportRenderer);
Process.Start(fileName);
}
public void PopulateGrid()
{
List<GridResults.ChildCollectionFirst> firstCollection = new List<GridResults.ChildCollectionFirst>
{
new GridResults.ChildCollectionFirst
{
Test1 = "First Child"
}
}.ToList();
List<GridResults.ChildCollectionSecond> secondCollection = new List<GridResults.ChildCollectionSecond>
{
new GridResults.ChildCollectionSecond
{
Test2 = "Second Child"
}
}.ToList();
List<GridResults.ChildCollectionThird> thirdCollection = new List<GridResults.ChildCollectionThird>
{
new GridResults.ChildCollectionThird
{
Test3 = "Third Child"
}
}.ToList();
List<GridResults.ChildCollectionFourth> fourthCollection = new List<GridResults.ChildCollectionFourth>
{
new GridResults.ChildCollectionFourth
{
Test4 = "Fourth Child"
}
}.ToList();
var resultsList = new List<GridResults>
{
new GridResults
{
Id = "First Parent",
Value = "Test Value 1",
ChildCollection1 = new List<GridResults.ChildCollectionFirst>(),
ChildCollection2 = new List<GridResults.ChildCollectionSecond>(),
ChildCollection3 = new List<GridResults.ChildCollectionThird>(),
ChildCollection4 = new List<GridResults.ChildCollectionFourth>()
},
new GridResults
{
Id = "Second Parent",
Value = "Test Value 2",
ChildCollection1 = firstCollection,
ChildCollection2 = secondCollection,
ChildCollection3 = thirdCollection,
ChildCollection4 = fourthCollection
},
new GridResults
{
Id = "Third Parent",
Value = "Test Value 3",
ChildCollection1 = new List<GridResults.ChildCollectionFirst>(),
ChildCollection2 = new List<GridResults.ChildCollectionSecond>(),
ChildCollection3 = new List<GridResults.ChildCollectionThird>(),
ChildCollection4 = new List<GridResults.ChildCollectionFourth>()
},
new GridResults
{
Id = "Fourth Parent",
Value = "Test Value 4",
ChildCollection1 = new List<GridResults.ChildCollectionFirst>(),
ChildCollection2 = new List<GridResults.ChildCollectionSecond>(),
ChildCollection3 = new List<GridResults.ChildCollectionThird>(),
ChildCollection4 = new List<GridResults.ChildCollectionFourth>()
},
new GridResults
{
Id = "Fifth Parent",
Value = "Test Value 5",
ChildCollection1 = new List<GridResults.ChildCollectionFirst>(),
ChildCollection2 = new List<GridResults.ChildCollectionSecond>(),
ChildCollection3 = new List<GridResults.ChildCollectionThird>(),
ChildCollection4 = new List<GridResults.ChildCollectionFourth>()
},
new GridResults
{
Id = "Sixth Parent",
Value = "Test Value 6",
ChildCollection1 = new List<GridResults.ChildCollectionFirst>(),
ChildCollection2 = new List<GridResults.ChildCollectionSecond>(),
ChildCollection3 = new List<GridResults.ChildCollectionThird>(),
ChildCollection4 = new List<GridResults.ChildCollectionFourth>()
}
};
// radGridView1.BeginUpdate();
radGridView1.DataSource = resultsList;
// radGridView1.EndUpdate();
foreach (GridViewTemplate t in this.radGridView1.Templates)
{
t.AutoSizeColumnsMode= GridViewAutoSizeColumnsMode.Fill;
}
}
public class GridResults
{
[DisplayName("ID")]
public string Id { get; set; }
[DisplayName("Value")]
public string Value { get; set; }
[DisplayName("Child Collection 1")]
public List<ChildCollectionFirst> ChildCollection1 { get; set; }
[DisplayName("Child Collection 2")]
public List<ChildCollectionSecond> ChildCollection2 { get; set; }
[DisplayName("Child Collection 3")]
public List<ChildCollectionThird> ChildCollection3 { get; set; }
[DisplayName("Child Collection 4")]
public List<ChildCollectionFourth> ChildCollection4 { get; set; }
[DisplayName("Child Collection 1")]
public class ChildCollectionFirst
{
[DisplayName("Test Header")]
public string Test1 { get; set; }
}
[DisplayName("Child Collection 2")]
public class ChildCollectionSecond
{
[DisplayName("Test Header 2")]
public string Test2 { get; set; }
}
[DisplayName("Child Collection 3")]
public class ChildCollectionThird
{
[DisplayName("Test Header 3")]
public string Test3 { get; set; }
}
[DisplayName("Child Collection 4")]
public class ChildCollectionFourth
{
[DisplayName("Test Header 4")]
public string Test4 { get; set; }
}
}
The observed result with duplicated rows is demonstrated here:
Please refer to the attached sample video.
StackTrace:
Message: Object reference not set to an instance of an object. Telerik.WinControls.UI.RadGridViewDragDropService.GetDragImageHint(ContentAlignment textAlignment, Bitmap hintImage, RectangleF textRectangle, Int32 hintImageWidth) Telerik.WinControls.UI.ColumnChooserItem.GetDragHintCore() Telerik.WinControls.RadItem.Telerik.WinControls.ISupportDrag.GetDragHint() Telerik.WinControls.RadDragDropService.PrepareContext():80 Telerik.WinControls.RadDragDropService.HandleMouseMove(Point mousePos):40 Telerik.WinControls.UI.RadGridViewDragDropService.HandleMouseMove(Point mousePosition):13 Telerik.WinControls.RadDragDropService.Telerik.WinControls.IMessageListener.PreviewMessage(Message& msg):150 Telerik.WinControls.RadMessageFilter.NotifyGetMessageEvent(Message& msg):41 Telerik.WinControls.RadMessageFilter.GetMessageHookProc(Int32 code, IntPtr wParam, IntPtr lParam):36
Code snippet for reproducing the error:
DataTable dt = new DataTable();
dt.Columns.Add("Id", typeof(int));
dt.Columns.Add("Title", typeof(string));
dt.Columns.Add("Price", typeof(decimal));
for (int i = 0; i < 10; i++)
{
dt.Rows.Add(i, "Row" + i, 0);
}
this.radGridView1.DataSource = dt;
this.radGridView1.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
GridViewSummaryItem summaryItem = new GridViewSummaryItem();
summaryItem.Name = "Price";
summaryItem.Aggregate = GridAggregateFunction.StDev;
GridViewSummaryRowItem summaryRowItem = new GridViewSummaryRowItem();
summaryRowItem.Add(summaryItem);
this.radGridView1.SummaryRowsBottom.Add(summaryRowItem);
With the current implementation, you can drop a column from the ColumnChooser window into the row. The column will be added to a place that reflects its position in the RadGridView Columns collection.
Code to replicate the issue:
GridPrintStyle style = new GridPrintStyle();
style.PrintHierarchy = true;
style.HierarchyIndent = 0;
style.ChildViewPrintMode = ChildViewPrintMode.SelectViewToPrint;
this.radGridView1.PrintStyle = style;
this.radGridView1.PrintPreview();
The attached gif file illustrates how the 20px hierarchy indent is returned after hitting the preview button.
The following article shows how to attach the source code to your project:
https://docs.telerik.com/devtools/winforms/knowledge-base/attach-telerik-source-code-to-your-project
When attaching the .NETCore projects (latest version R1 2023) to your application, the project can't be built.
Use the code below and click the button to make the grid ReadOnly:
public TestForm()
{
InitializeComponent();
GridViewCheckBoxColumn checkBoxColumn = new GridViewCheckBoxColumn("checkbox");
checkBoxColumn.EnableHeaderCheckBox = true;
this.radGridView1.Columns.Add(checkBoxColumn);
this.radGridView1.Columns.Add("text");
this.Shown += TestForm_Shown;
}
private void TestForm_Shown(object sender, EventArgs e)
{
this.radGridView1.Columns["checkbox"].IsVisible = !this.radGridView1.Columns["checkbox"].IsVisible;
}
private void radButton1_Click(object sender, EventArgs e)
{
this.radGridView1.ReadOnly = !this.radGridView1.ReadOnly;
}
Steps to reproduce:
1. Bind the grid and enable the search row
2. Enter some search text
3. Delete records from the applied DataSource collection. It may be necessary to perform the delete operation several times before the error occurs.
The error can be reproduced with the following code snippet:
Dim dt As New DataTable
Sub New()
InitializeComponent()
dt.Columns.Add("Id", GetType(Integer))
dt.Columns.Add("Name", GetType(String))
For index = 1 To 10000
dt.Rows.Add(index, Guid.NewGuid.ToString())
Next
Me.RadGridView1.DataSource = dt
Me.RadGridView1.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill
Me.RadGridView1.AllowSearchRow = True
End Sub
Private Sub RadButton1_Click(sender As Object, e As EventArgs) Handles RadButton1.Click
For index = 1 To 50
dt.Rows.RemoveAt(0)
Next
End Sub
There is a sample project attached as well and its result is illustrated in the gif file.
Stack trace:
at Telerik.WinControls.UI.MasterGridViewTemplate.set_CurrentRow(GridViewRowInfo value) at Telerik.WinControls.UI.RadGridView.set_CurrentRow(GridViewRowInfo value) at Telerik.WinControls.UI.GridViewSearchRowInfo.SetCurrent(GridSearchResultCellInfo cell) at Telerik.WinControls.UI.GridViewSearchRowInfo.SetCurrent(GridSearchResultCellInfo cell, Boolean checkInvokeRequired) at Telerik.WinControls.UI.GridViewSearchRowInfo.SelectNextSearchResult() at Telerik.WinControls.UI.GridViewSearchRowInfo.Search(String criteria) at Telerik.WinControls.UI.GridViewSearchRowInfo.Telerik.WinControls.UI.IGridViewEventListener.PostProcessEvent(GridViewEvent eventData) at Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode) at Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent) at Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents() at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent) at Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewTemplate template, GridViewEvent eventData, Boolean postUI) at Telerik.WinControls.UI.GridViewRowCollection.DispatchDataViewChangedEvent(DataViewChangedEventArgs args, GridEventType type) at Telerik.WinControls.UI.GridViewRowCollection.ListSource_CollectionChanged(Object sender, NotifyCollectionChangedEventArgs e) at Telerik.WinControls.Data.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e) at Telerik.WinControls.Data.RadListSource`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e) at Telerik.WinControls.Data.RadListSource`1.RemoveItem(Int32 index) at Telerik.WinControls.Data.RadListSource`1.currencyManager_ListChanged(Object sender, ListChangedEventArgs e) at System.Windows.Forms.CurrencyManager.OnListChanged(ListChangedEventArgs e) at System.Windows.Forms.CurrencyManager.List_ListChanged(Object sender, ListChangedEventArgs e) at System.Windows.Forms.BindingSource.OnListChanged(ListChangedEventArgs e) at System.Windows.Forms.BindingSource.InnerList_ListChanged(Object sender, ListChangedEventArgs e) at System.ComponentModel.BindingList`1.OnListChanged(ListChangedEventArgs e) at System.ComponentModel.BindingList`1.FireListChanged(ListChangedType type, Int32 index) at System.ComponentModel.BindingList`1.RemoveItem(Int32 index) at System.Collections.ObjectModel.Collection`1.Remove(T item) at System.Collections.ObjectModel.Collection`1.System.Collections.IList.Remove(Object value) at System.Windows.Forms.BindingSource.Remove(Object value)
An exception occurs when trying to export the RadGridView using the ExportToPDF class with the following message.
System.SystemException: 'System.MethodAccessException: Attempt by security transparent method 'Telerik.Pdf.Gdi.GdiFontEnumerator.get_FamilyNames()' to call native code through method 'Telerik.WinControls.NativeMethods.EnumFontFamiliesEx(IntPtr, LOGFONT, FontEnumDelegate, Int32, Int32)' failed. Methods must be security critical or security safe-critical to call native code.
at Telerik.Pdf.Gdi.GdiFontEnumerator.get_FamilyNames()
at Telerik.Apoc.Pdf.FontSetup.AddSystemFonts(FontType fontType)
at Telerik.Apoc.Render.Pdf.PdfRenderer.SetupFontInfo(FontInfo fontInfo)
at Telerik.Apoc.Fo.FOTreeBuilder.Parse(XmlReader reader)'
This exception is observed only when the referenced DLLs target the .Net Framework 4.8 version.
Run the attached sample project on a monitor with 100% DPI scaling. Then, try moving the form to the second monitor with 150% DPI scaling. You will notice that the following error occurs:
Workaround: instead of using a RadTextBoxControlElement in the custom cell, feel free to use a RadTextBoxElement. However, please have in mind that RadTextBoxElement hosts the MS TextBox and using controls in grid cells may slow down the scrolling and will cause visual glitches as they do not support clipping.