GRIDVIEW导出EXCEL问题

[chenminghong]

由于我在GRIDVIEW是动态创建列ImageTemplate模版
可是我导出EXCEL时，这个列无法导出来。不知道哪里出现问题，
以下为代码：
public class ImageTemplate : ITemplate
{
private DataControlRowType templateType;
private string columnName;

public ImageTemplate(DataControlRowType type, string colname)
{
templateType = type;
columnName = colname;
}

public void InstantiateIn(System.Web.UI.Control container)
{
switch (templateType)
{
case DataControlRowType.Header:
Literal lc = new Literal();
lc.Text = columnName;
container.Controls.Add(lc);
break;
case DataControlRowType.DataRow://可以定义自己想显示的控件以及绑定事件
Image ig = new Image();

ig.ID = "image1";
ig.Width = 60;
ig.Height = 50;
ig.ImageUrl = columnName;
container.Controls.Add(ig);
break;
default:
break;
}
}
}


动态创建：
gvList.Columns.Clear();
TemplateField customField = new TemplateField();
customField.ShowHeader = true;

// ItemTemplate it = new ItemTemplate();
//customField.HeaderTemplate =
customField.HeaderTemplate = new ImageTemplate(DataControlRowType.Header, "款号图");//添加的列标题
ImageTemplate gvt = new ImageTemplate(DataControlRowType.DataRow, "");//空白列
customField.ItemTemplate = gvt;
this.gvList.Columns.Add(customField);

导出EXCEL：
PrepareControlForExport(ctl);
HttpContext.Current.Response.Charset = "GB2312";
HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;


HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8).ToString());
HttpContext.Current.Response.ContentType = "application/ms-excel";

ctl.Page.EnableViewState = false;
System.IO.StringWriter tw = new System.IO.StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(tw);
ctl.RenderControl(hw);
HttpContext.Current.Response.Write(tw.ToString());
HttpContext.Current.Response.End();

[t101lian]

动态创建列ImageTemplate模版？ 帮顶

[我本良人]

http://www.cnblogs.com/stswordman/archive/2006/08/24/485641.html

[Teln_小凯]

[huaneramn]

太长了。。。。。。。。。。。。。。。。。

[chenminghong]

引用 6 楼 insus 的回复:

Refer & try: http://www.cnblogs.com/insus/archive/2013/05/14/3077826.html

能否对图片进行缩小，这个导出来就是图片的大小，要调整，，如果几百张，那不是要调整死了

[chenminghong]

引用 2 楼 yangmingxing980 的回复:

http://www.cnblogs.com/stswordman/archive/2006/08/24/485641.html

可以没有导出图片的，，，帮忙指点，谢谢

[insus]

Refer & try: http://www.cnblogs.com/insus/archive/2013/05/14/3077826.html