我的 rdlc 报告有问题。当我开始打印它时，抛出了异常。我不知道它是什么类型，但我有堆栈跟踪。
报告路径正确。
这是我的代码：
ThreadPool.QueueUserWorkItem(o =>
{
var patientReportPresenter = PatientReportPresenter.Convert(patient);
using (var demo = new PrintComponent(patientReportPresenter, applicationSettings.PrinterName, "DataSet1", false))
{
try
{
string exeFolder = Path.GetDirectoryName(Application.ExecutablePath);
string reportPath = Path.Combine(exeFolder, @"Template\Report1.rdlc");
var report = new LocalReport
{
ReportPath = reportPath
};
demo.Run(report);
}
catch (Exception ex)
{
string exeFolder = Path.GetDirectoryName(Application.ExecutablePath);
string reportPath = Path.Combine(exeFolder, @"Template\Report1.rdlc");
MessageBox.Show(
ex.Message + Environment.NewLine + ex.StackTrace + Environment.NewLine + reportPath,
@"Print error", MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
}
}, null);
这是我的打印课：
public class PrintComponent : IDisposable
{
private readonly string _printerName;
private int m_currentPageIndex;
private IList<Stream> m_streams;
private readonly string _dataSetName;
private bool _landscape;
private PatientReportPresenter _patientReportPresenter;
public PrintComponent(PatientReportPresenter patientReportPresenter, string printerName, string dataSetName, bool landscape)
{
_patientReportPresenter = patientReportPresenter;
_printerName = printerName;
_dataSetName = dataSetName;
_landscape = landscape;
}
private DataTable LoadSalesData()
{
var table = new DataTable();
table.Columns.Add("Address", typeof(string));
//...
table.Rows.Add(_patientReportPresenter.Address, ...);
return table;
}
private Stream CreateStream(string name,
string fileNameExtension, Encoding encoding,
string mimeType, bool willSeek)
{
Stream stream = new MemoryStream();
m_streams.Add(stream);
return stream;
}
private void Export(LocalReport report)
{
string deviceInfo;
if (_landscape)
{
deviceInfo =
@"<DeviceInfo>
<OutputFormat>EMF</OutputFormat>
<PageWidth>11.7in</PageWidth>
<PageHeight>8.3in</PageHeight>
<MarginTop>0in</MarginTop>
<MarginLeft>0in</MarginLeft>
<MarginRight>0in</MarginRight>
<MarginBottom>0in</MarginBottom>
</DeviceInfo>";
}
else
{
deviceInfo =
@"<DeviceInfo>
<OutputFormat>EMF</OutputFormat>
<PageWidth>8.3in</PageWidth>
<PageHeight>11.7in</PageHeight>
<MarginTop>0.3in</MarginTop>
<MarginLeft>0in</MarginLeft>
<MarginRight>0in</MarginRight>
<MarginBottom>0in</MarginBottom>
</DeviceInfo>";
}
m_streams = new List<Stream>();
Warning[] warnings;
report.Render("Image", deviceInfo, CreateStream, out warnings);
foreach (Stream stream in m_streams)
stream.Position = 0;
}
private void PrintPage(object sender, PrintPageEventArgs ev)
{
var pageImage = new
Metafile(m_streams[m_currentPageIndex]);
var adjustedRect = new Rectangle(
ev.PageBounds.Left - (int)ev.PageSettings.HardMarginX,
ev.PageBounds.Top - (int)ev.PageSettings.HardMarginY,
ev.PageBounds.Width,
ev.PageBounds.Height);
ev.Graphics.FillRectangle(Brushes.White, adjustedRect);
ev.Graphics.DrawImage(pageImage, adjustedRect);
}
private void Print()
{
if (m_streams == null || m_streams.Count == 0)
throw new Exception("Error: no stream to print.");
var printDoc = new PrintDocument {PrinterSettings = {PrinterName = _printerName}};
if (_landscape)
{
printDoc.DefaultPageSettings.Landscape = true;
}
printDoc.DefaultPageSettings.Margins = new Margins(0, 0, 0, 0);
if (!printDoc.PrinterSettings.IsValid)
{
throw new Exception("Error: cannot find the default printer.");
}
printDoc.PrintPage += PrintPage;
m_currentPageIndex = 0;
printDoc.Print();
}
public void Run(LocalReport report)
{
report.DataSources.Add(new ReportDataSource(_dataSetName, LoadSalesData()));
Export(report);
Print();
}
public void Dispose()
{
if (m_streams != null)
{
foreach (Stream stream in m_streams)
stream.Close();
m_streams = null;
}
}
}
我做错了什么？