我必须在我的 rdlc 中渲染一个位图(使用 .Net Reporting),然后以不同的格式(包括 pdf)渲染这个文件。DataSet 由 SeriesItemModels 对象 List 组成,它(列表的每个项目)具有一个定义为 Bitmap 类型的属性!问题是我面临两个问题:-似乎位图未在 rdlc 中呈现-文件扩展名消失并且下载的文件已损坏这是 Print 方法(我在渲染 pdf 的操作中调用的方法文件)
public class StatisticsStateModels
{
public static void Print(List<SeriesItemModels> items, string printFormat)
{
ReportViewer rptViewer = new ReportViewer();
rptViewer.ProcessingMode = ProcessingMode.Local;
rptViewer.LocalReport.EnableExternalImages = true;
rptViewer.LocalReport.ReportPath = @HttpContext.Current.Request.PhysicalApplicationPath + "Content/States/Statistics.rdlc";
rptViewer.LocalReport.DataSources.Add(new ReportDataSource("StatisticsModelsDataSet", StatisticsStateModels.GetStatistics(items)));
HttpResponse response = HttpContext.Current.Response;
DateTime now = DateTime.Now;
string filename = now.Year + "" + now.Month + "" + now.Day + "" + now.Hour + "" + now.Minute + "" + now.Second + "" + now.Millisecond;
Warning[] warnings;
string[] streamIds;
string mimeType = string.Empty;
string encoding = string.Empty;
string extension = string.Empty;
switch (printFormat.ToLower())
{
case "pdf":
byte[] pdfContent = rptViewer.LocalReport.Render("PDF", null, out mimeType, out encoding, out extension, out streamIds, out warnings);
response.Clear();
//response.ClearHeaders();
response.Buffer = true;
response.ContentType = mimeType;
response.AddHeader("content-disposition", "attachment; filename=" + filename + "." + extension);
// response.ContentType = "application/pdf";
response.BinaryWrite(pdfContent);
response.Flush(); // send it to the client to download
response.End();
break;
default:
break;
}
}
}
和 DataSet 方法
public static List<SeriesItemModels> GetStatistics(List<SeriesItemModels> items)
{
return items;
}
最后,您有下面的 SeriesItem 模型
public class SeriesItemModels
{
public string name { get; set; }
public List<object> data { get; set; }
public Bitmap graph { get; set; }
public SeriesItemModels() {
this.name = "";
this.graph = validBitMap();//be sure: this bitMap is external and valid!
this.data = new List<object>();
}
}
PS:validBitMap 生成完美正确!我试图将它保存在服务器上,它有效!但尽管我努力,文件仍然损坏。
你能告诉我如何解决这些问题吗?为什么我的文件损坏了?
谢谢