ES-976509 - Resolve Issues in Public Syncfusion Code Examples for DataGrid XAML Controls

Author: SreemonPremkumarM

README.md

@@ -1,2 +1,129 @@
-# How to improve the performance for clipboard paste operation
-This example demonstrates that how to improve the performance for clipboard paste operation
+# How to Improve the Performance of Clipboard Paste Operation in WinForms GridControl?
+
+This example demonstrates that how to improve the performance for clipboard paste operation in [WinForms GridControl](https://www.syncfusion.com/winforms-ui-controls/grid-control).
+
+Pasting performance can be improved by using the [Model.ClipboardPaste](https://help.syncfusion.com/cr/windowsforms/Syncfusion.Windows.Forms.Grid.GridModel.html#Syncfusion_Windows_Forms_Grid_GridModel_ClipboardPaste) event and pasting the copied text manually for the selected range. This method of pasting avoids the iteration of cells while getting the values from the Clipboard.
+
+``` csharp
+//Event Triggering
+this.Model.ClipboardPaste += model_ClipboardPaste;
+ 
+//Event Customization
+public void model_ClipboardPaste(object sender, GridCutPasteEventArgs e)
+{    
+    GridRangeInfoList rangeList;
+    GridModel model = sender as GridModel;
+    model.Selections.GetSelectedRanges(out rangeList, true);
+    GridRangeInfo range = rangeList.GetOuterRange(rangeList.ActiveRange);
+    //Getting data from clipboard.
+    string psz = GetClipboardText();
+    this.PasteTextFromBuffer(psz, range, e.ClipboardFlags);
+    e.Handled = true;
+}
+ 
+private string GetClipboardText()
+{
+    string buffer = null;
+    IDataObject iData = null;
+    if (GridUtil.IsSet(this.Model.CutPaste.ClipboardFlags, GridDragDropFlags.Styles | GridDragDropFlags.Text))
+    {
+        iData = Clipboard.GetDataObject();
+    }
+    if (GridUtil.IsSet(this.Model.CutPaste.ClipboardFlags, GridDragDropFlags.Text)
+                    && iData != null)
+    {
+        if (iData.GetDataPresent(DataFormats.UnicodeText))
+        {
+            buffer = iData.GetData(DataFormats.UnicodeText) as string;
+        }
+        else if (iData.GetDataPresent(DataFormats.Text))
+        {
+            buffer = iData.GetData(DataFormats.Text) as string;
+        }
+    }
+    return buffer;
+}
+ 
+private bool PasteTextFromBuffer(string psz, GridRangeInfo range, int dragDropFlags)
+{
+    bool canceled = false;
+ 
+    OperationFeedback op = new OperationFeedback(Model);
+    try
+    {
+        op.AllowRollback = true;
+        op.AllowNestedProgress = false;
+ 
+        int rowIndex, colIndex;
+ 
+        Model.ConfirmChanges();
+        Model.CommandStack.BeginTrans("Paste");
+ 
+        rowIndex = range.Top;
+        colIndex = range.Left;
+ 
+ 
+        int nLastCol = colIndex;
+        int size = psz.Length;
+ 
+        try
+        {
+            string[] copiedValue = psz.Split(new[] { "\r\n" }, StringSplitOptions.None);
+ 
+            for (int i = 0; i < copiedValue.Length; i++)
+            {
+                string[] value = copiedValue[i].Split(new[] { "\t" }, StringSplitOptions.None);
+ 
+                for (int j = 0; j < value.Length; j++)
+                {
+                    GridStyleInfo style = null;
+                    style = Model[rowIndex, colIndex];
+                    this.Model.TextDataExchange.PasteTextRowCol(rowIndex, colIndex, value[j]);
+                    colIndex++;
+                }
+                rowIndex++;
+                colIndex = range.Left;
+            }
+            if (size > 0)
+            {
+                op.PercentComplete = (int)((rowIndex * colIndex) * 100 / size);
+            }
+ 
+            if (op.ShouldCancel)
+            {
+                throw new GridUserCanceledException();
+            }
+        }
+        catch (GridUserCanceledException ex)
+        {
+            TraceUtil.TraceExceptionCatched(ex);
+            if (!ExceptionManager.RaiseExceptionCatched(this, ex))
+            {
+                throw;
+            }
+ 
+            canceled = true;
+        }
+ 
+        if (canceled && op.RollbackConfirmed)
+        {
+            Model.CommandStack.Rollback();
+        }
+        else
+        {
+            Model.CommandStack.CommitTrans();
+        }
+        //// Also formula refresh cells that have references to the pasted cells.
+        Model.Refresh();
+ 
+        return !canceled;
+    }
+    finally
+    {
+        op.Close();
+        Model.EndUpdate();
+    }
+}
+```
+
+Take a moment to peruse the WinForms [GridControl - Clipboard support](https://help.syncfusion.com/windowsforms/grid-control/copy-and-paste#paste) documentation, where you can find about GridControl clipboard operation with code examples.