DataGridView圖像文本單元格

爲了美觀，有時候我們需要文本單元格中帶有圖標，然而微軟自帶的DataGridView控件中沒有類似的控件。下面的示例就是實現這樣的一個控件。在文本前顯示圖像，顯示出的圖像如果太大，效果不好看，可以結合之前寫過的C#圖像縮放與裁剪，自己加以修改整合。

 

部分代碼：

public class TextAndImageColumn : DataGridViewTextBoxColumn
    {
        private Image imageValue;
        private Size imageSize;

        public TextAndImageColumn()
        {
            this.CellTemplate = new TextAndImageCell();
        }

        public override object Clone()
        {
            TextAndImageColumn c = base.Clone() as TextAndImageColumn;
            c.imageValue = this.imageValue;
            c.imageSize = this.imageSize;
            return c;
        }

        public Image Image
        {
            get { return this.imageValue; }
            set
            {
                if (this.Image != value)
                {
                    this.imageValue = value;
                    this.imageSize = value.Size;

                    if (this.InheritedStyle != null)
                    {
                        Padding inheritedPadding = this.InheritedStyle.Padding;
                        this.DefaultCellStyle.Padding = new Padding(imageSize.Width,
                            inheritedPadding.Top, inheritedPadding.Right,
                            inheritedPadding.Bottom);
                    }
                }
            }
        }

        private TextAndImageCell TextAndImageCellTemplate
        {
            get { return this.CellTemplate as TextAndImageCell; }
        }

        internal Size ImageSize
        {
            get { return imageSize; }
        }

    }

    public class TextAndImageCell : DataGridViewTextBoxCell
    {
        private Image imageValue;
        private Size imageSize;

        public override object Clone()
        {
            TextAndImageCell c = base.Clone() as TextAndImageCell;
            c.imageValue = this.imageValue;
            c.imageSize = this.imageSize;
            return c;
        }

        public Image Image
        {
            get
            {
                if (this.OwningColumn == null || this.OwningTextAndImageColumn == null)
                {
                    return imageValue;
                }
                else if (this.imageValue != null)
                {
                    return this.imageValue;
                }
                else
                {
                    return this.OwningTextAndImageColumn.Image;
                }
            }

            set
            {
                if (this.imageValue != value)
                {
                    this.imageValue = value;
                    this.imageSize = value.Size;

                    Padding inheritedPadding = this.InheritedStyle.Padding;
                    this.Style.Padding = new Padding(imageSize.Width,
                        inheritedPadding.Top, inheritedPadding.Right,
                        inheritedPadding.Bottom);
                }
            }
        }

        protected override void Paint(Graphics graphics, Rectangle clipBounds,
            Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState,
            object value, object formattedValue, string errorText,
            DataGridViewCellStyle cellStyle,
            DataGridViewAdvancedBorderStyle advancedBorderStyle,
            DataGridViewPaintParts paintParts)
        {
            // Paint the base content
            base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState,
                value, formattedValue, errorText, cellStyle,
                advancedBorderStyle, paintParts);

            if (this.Image != null)
            {
                // Draw the image clipped to the cell.
                System.Drawing.Drawing2D.GraphicsContainer container =
                graphics.BeginContainer();

                graphics.SetClip(cellBounds);
                graphics.DrawImageUnscaled(this.Image, cellBounds.Location);
                graphics.EndContainer(container);
            }
        }

        private TextAndImageColumn OwningTextAndImageColumn
        {
            get { return this.OwningColumn as TextAndImageColumn; }
        }
    }

 

 

 

轉載請註明出處！！！

http://blog.csdn.net/stuqbx