datagridview重叠_datagridview绑定list_datagridview右键菜单(46)

下面这段代码扩展了DataGridViewTextBoxColumn 和DataGridViewTextBoxCell类，将一个图片显示在文本旁边。这个示例使用了DataGridViewCellStyle.Padding 属性来调整文本的位置，重写了Paint 方法来绘制图片。该示例可以得到简化，方法是处理CellPainting 事件，在这里实现类的功能。

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) {

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