void SetImage(DpCell cell, string strFileName)
{
if (this.dpTable_items.InvokeRequired)
{
this.Invoke(new Action <DpCell, string>(SetImage), cell, strFileName);
return;
}
cell.OwnerDraw = true;
ImageCellInfo info = new ImageCellInfo();
info.FileName = strFileName;
cell.Tag = info;
cell.Text = ""; // 迫使刷新
}
void SetImage(DpCell cell, string strFileName)
{
if (this.dpTable_browseLines.InvokeRequired)
{
this.Invoke(new Action<DpCell, string>(SetImage), cell, strFileName);
return;
}
cell.OwnerDraw = true;
ImageCellInfo info = new ImageCellInfo();
info.FileName = strFileName;
cell.Tag = info;
cell.Text = ""; // 迫使刷新
}
private void dpTable_items_PaintRegion(object sender, PaintRegionArgs e)
{
if (e.Action == "query")
{
// 测算图像高度
DpCell cell = e.Item as DpCell;
// DpRow row = cell.Container;
ImageCellInfo cell_info = (ImageCellInfo)cell.Tag;
// string strFileName = (string)cell.Tag;
if (cell_info == null || string.IsNullOrEmpty(cell_info.FileName) == true)
{
e.Height = 0;
}
else
{
try
{
using (Stream s = File.Open(cell_info.FileName, FileMode.Open))
{
using (Image image = Image.FromStream(s))
{
e.Height = image.Height;
}
}
}
catch (Exception ex)
{
// throw new Exception("read image error:" + ex.Message);
if (cell_info.RetryCount < 5)
{
cell_info.RetryCount++;
DpRow row = cell.Container;
AddTraceItem(row);
}
else
{
e.Height = 0;
cell.OwnerDraw = false;
cell.Text = "read image error";
}
return;
}
if (this.dpTable_items.MaxTextHeight < e.Height)
{
this.dpTable_items.MaxTextHeight = e.Height;
}
}
return;
}
{
Debug.Assert(e.Action == "paint", "");
DpCell cell = e.Item as DpCell;
ImageCellInfo cell_info = (ImageCellInfo)cell.Tag;
// string strFileName = (string)cell.Tag;
if (cell_info != null && string.IsNullOrEmpty(cell_info.FileName) == false)
{
try
{
using (Stream s = File.Open(cell_info.FileName, FileMode.Open))
{
using (Image image = Image.FromStream(s))
{
// 绘制图像
e.pe.Graphics.DrawImage(image,
(float)e.X,
(float)e.Y);
}
}
}
catch (Exception ex)
{
// throw new Exception("read image error:" + ex.Message);
if (cell_info.RetryCount < 5)
{
cell_info.RetryCount++;
DpRow row = cell.Container;
AddTraceItem(row);
}
else
{
cell.OwnerDraw = false;
cell.Text = "read image error";
}
}
}
else
{
// 绘制文字“正在加载”
}
}
}
