Merge pull request #1823 from giduac/1820-V85-kryptonDataGridView-doe…

…s-not-add-krypton-columns-on-auto-generate

1820-V85-kryptonDataGridView-does-not-add-krypton-columns-on-auto-gen…

Documents/Help/Changelog.md

@@ -1,6 +1,8 @@
 # <img src="https://github.com/Krypton-Suite/Standard-Toolkit/blob/master/Krypton.png?raw=true"> Standard Toolkit - ChangeLog
 
 =======
+# 2024-11-14 - Build 2411 (Patch 4) - November 2024
+* Resolved [#1820](https://github.com/Krypton-Suite/Standard-Toolkit/issues/1820), When KryptonDataGridView.AutoGenerate is set Winforms columns are used. See the issue for full text.
 
 # 2024-10-14 - Build 2410 (Patch 3) - October 2024
 * Implemented [#1813](https://github.com/Krypton-Suite/Standard-Toolkit/issues/1813), LTS Configuration

Source/Krypton Components/Krypton.Toolkit/Controls Toolkit/KryptonDataGridView.cs

@@ -350,6 +350,14 @@ protected override void Dispose(bool disposing)
         #endregion
 
         #region Public
+        [Browsable(false)]
+        [Description(@"When true and AutoGenerateColumns is true the KryptonDataGridView will use Krypton column types, when false the standard WinForms column types.")]
+        [DefaultValue(true)]
+        public bool AutoGenerateKryptonColumns {
+            get;
+            set;
+        } = true;
+
         /// <summary>Gets or sets the <see cref="T:System.Windows.Forms.ContextMenuStrip" /> associated with this control.</summary>
         /// <returns>The <see cref="T:System.Windows.Forms.ContextMenuStrip" /> for this control, or <see langword="null" /> if there is no <see cref="T:System.Windows.Forms.ContextMenuStrip" />. The default is <see langword="null" />.</returns>
         [Category(@"Behavior")]
@@ -1002,6 +1010,60 @@ protected virtual void OnButtonSpecChanged(object sender, [DisallowNull] EventAr
         #endregion
 
         #region Protected Override
+        /// <inheritdoc/>
+        protected override void OnDataMemberChanged(EventArgs e)
+        {
+            base.OnDataMemberChanged(e);
+
+            if (AutoGenerateColumns
+                && AutoGenerateKryptonColumns
+                && DataSource is not null)
+            {
+                ReplaceDefaultColumsWithKryptonColumns();
+            }
+        }
+
+        /// <inheritdoc/>
+        protected override void OnDataSourceChanged(EventArgs e)
+        {
+            base.OnDataSourceChanged(e);
+
+            if (AutoGenerateColumns
+                && AutoGenerateKryptonColumns
+                && DataSource is not null)
+            {
+                ReplaceDefaultColumsWithKryptonColumns();
+            }
+        }
+
+        /// <inheritdoc/>
+        protected override void OnAutoGenerateColumnsChanged(EventArgs e)
+        {
+            // First handle the base the event
+            base.OnAutoGenerateColumnsChanged(e);
+
+            // If needed convert the winforms columns to Krypton columns
+            if (AutoGenerateColumns
+                && AutoGenerateKryptonColumns
+                && DataSource is not null)
+            {
+                ReplaceDefaultColumsWithKryptonColumns();
+            }
+        }
+
+        /// <inheritdoc/>
+        protected override void OnDataBindingComplete(DataGridViewBindingCompleteEventArgs e)
+        {
+            base.OnDataBindingComplete(e);
+
+            if (AutoGenerateColumns
+                && AutoGenerateKryptonColumns
+                && DataSource is not null)
+            {
+                ReplaceDefaultColumsWithKryptonColumns();
+            }
+        }
+
         /// <summary>
         /// Raises the PaintBackground event.  
         /// </summary>
@@ -1633,6 +1695,52 @@ internal bool RightToLeftInternal
         #endregion
 
         #region Implementation
+        /// <summary>
+        /// Handles the auto generation of Krypton columns<br/>
+        /// </summary>
+        private void ReplaceDefaultColumsWithKryptonColumns()
+        {
+            DataGridViewColumn currentColumn;
+            KryptonDataGridViewTextBoxColumn newColumn;
+            List<int> columnsProcessed = [];
+            int index;
+
+            for (int i = 0 ; i < ColumnCount ; i++)
+            {
+                currentColumn = Columns[i];
+
+                /* 
+                 * Auto generated columns are always of type System.Windows.Forms.DataGridViewTextBoxColumn.
+                 * Only columns that are of type DataGridViewTextBoxColumn and have the DataPropertyName set will be converted to krypton Columns.
+                 */
+                if (currentColumn is DataGridViewTextBoxColumn && currentColumn.DataPropertyName.Length > 0)
+                {
+                    index = currentColumn.Index;
+                    columnsProcessed.Add(index);
+
+                    newColumn = new KryptonDataGridViewTextBoxColumn
+                    {
+                        Name = currentColumn.Name,
+                        DataPropertyName = currentColumn.DataPropertyName,
+                        HeaderText = currentColumn.HeaderText,
+                        Width = currentColumn.Width
+                    };
+
+                    Columns.RemoveAt(index);
+                    Columns.Insert(index, newColumn);
+                }
+            }
+
+            /*
+             * After the columns have been replaced they need a little help so they have the same width as when only Winforms columns would've been auto added.
+             * Setting this value in the above for loop does not work.
+             */
+            for (int i = 0 ; i < columnsProcessed.Count ; i++)
+            {
+                Columns[i].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
+            }
+        }
+
         private void SetupVisuals()
         {
             // Setup the invoke used to refresh display