用途：.NET 2.0+; VS 2005;
我有以下的Custom DataGridView;代码如下所述。
在这里，我有一个TextandImageCell，但插图总是按照像
这样的单元格中的文字后面的顺序（图片|文字）
但是我的要求是在像
这样的单元格中以相反的方式使用它（文字|图片）
有没有解决方法呢？
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
namespace MyWindowsApplication
{
public class DataGridViewRadioButtonColumn : DataGridViewCheckBoxColumn
{
internal const int radioButtonSize = 14;
public DataGridViewRadioButtonColumn()
: base()
{
this.ReadOnly = true;
}
internal static void Paint(Graphics g, Rectangle cellBounds, bool state)
{
cellBounds.Inflate(-1, -1);
Brush drawBrsh = new SolidBrush(SystemColors.Control);
g.FillRectangle(drawBrsh, cellBounds);
cellBounds.Inflate(0, -((cellBounds.Height - radioButtonSize) / 2));
ControlPaint.DrawRadioButton(g, cellBounds, (state) ? ButtonState.Checked : ButtonState.Normal);
drawBrsh.Dispose();
}
}
public class DataGridViewRadioButtonCell : DataGridViewCheckBoxCell
{
}
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; }
}
}
public class LinkAndImageColumn : DataGridViewLinkColumn
{
private Image imageValue;
private Size imageSize;
public LinkAndImageColumn()
{
this.CellTemplate = new LinkAndImageCell();
}
public override object Clone()
{
LinkAndImageColumn c = base.Clone() as LinkAndImageColumn;
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 LinkAndImageCell LinkAndImageCellTemplate
{
get { return this.CellTemplate as LinkAndImageCell; }
}
internal Size ImageSize
{
get { return imageSize; }
}
}
public class LinkAndImageCell : DataGridViewLinkCell
{
private Image imageValue;
private Size imageSize;
public override object Clone()
{
LinkAndImageCell c = base.Clone() as LinkAndImageCell;
c.imageValue = this.imageValue;
c.imageSize = this.imageSize;
return c;
}
public Image Image
{
get
{
if (this.OwningColumn == null || this.OwningLinkAndImageColumn == null)
{
return imageValue;
}
else if (this.imageValue != null)
{
return this.imageValue;
}
else
{
return this.OwningLinkAndImageColumn.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 LinkAndImageColumn OwningLinkAndImageColumn
{
get { return this.OwningColumn as LinkAndImageColumn; }
}
}
public class CustomDataGridView : DataGridView
{
private DataGridViewRow _currentSelectedRow = null;
public DataGridViewRow CurrentSelectedRow
{
get { return _currentSelectedRow; }
set { _currentSelectedRow = value; }
}
protected override void OnCellClick(DataGridViewCellEventArgs e)
{
bool b = false;
if (e.RowIndex > -1)
{
DataGridViewCell cell = this[e.ColumnIndex, e.RowIndex];
if (cell.OwningColumn is DataGridViewCheckBoxColumn)
{
if (cell.FormattedValue != null)
{
for (int i = 0; i < this.RowCount; i++)
{
this[e.ColumnIndex, i].Value = false;
}
cell.Value = true;
}
}
}
base.OnCellClick(e);
}
protected override void OnCellPainting(DataGridViewCellPaintingEventArgs e)
{
bool b = false;
if ((e.RowIndex > -1) && (e.ColumnIndex > -1) && (this.Columns[e.ColumnIndex] is DataGridViewRadioButtonColumn))
{
e.PaintBackground(e.CellBounds, true);
if (e.Value != null)
{
if (e.Value.ToString() == "1")
{
b = true;
}
else b = false;
}
DataGridViewRadioButtonColumn.Paint(e.Graphics, e.CellBounds, b);
e.Handled = true;
}
base.OnCellPainting(e);
}
protected override void OnCellMouseDown(DataGridViewCellMouseEventArgs e)
{
if (e.RowIndex >= 0)
{
this.CurrentSelectedRow = this.Rows[e.RowIndex];
this.CurrentCell = this[0, e.RowIndex];
this.Rows[e.RowIndex].DefaultCellStyle.SelectionBackColor = Color.Gold;
}
base.OnCellMouseDown(e);
}
}
}
答案 0 :(得分：0)
要在文字后显示图片，您应该将此代码添加/更新为Paint类的LinkAndImageCell方法
if (this.Image != null)
{
Size textSize = TextRenderer.MeasureText(value.ToString(), cellStyle.Font, cellBounds.Size);
int imageXLocation = cellBounds.Location.X + textSize.Width;
int imageYLocation = cellBounds.Location.Y + textSize.Height / 2 ;
Point imageLocation = new Point(imageXLocation, imageYLocation);
GraphicsContainer container = graphics.BeginContainer();
graphics.SetClip(cellBounds);
graphics.DrawImageUnscaled(Image, imageLocation);
graphics.EndContainer(container);
}