C# 我是否可以从SQL Reporting Services（.rdlc）生成基于图像的PDF报告，而不将图像保存在任何位置？

情景：

我有一个包含多个图表的网页，我有一个“导出为PDF”按钮，用户可以点击该按钮，它生成一个PDF，然后用户可以保存

鉴于：

一种Telerik雷达图，可将自身保存到内存流中，如下所示：

MemoryStream chartStream = new MemoryStream();
RadChart1.Save(chartStream, ImageFormat.Png);

使用此内存流，是否可以使用SQL Reporting Services构建PDF，而不首先将其保存到文件或必须首先将其插入MSSQL表

我也会投票和/或接受任何开源或免费解决这个问题的答案

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谢谢

我过去使用的方法没有问题，对我来说非常有效。

我过去使用的方法没有问题，对我来说非常有效。

我使用iTextSharp生成所有PDF。有一点学习的曲线，但它变得很容易。以下是一些链接：

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我使用iTextSharp生成所有PDF。有一点学习的曲线，但它变得很容易。以下是一些链接：

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好吧，我刚想好。这个答案有三个要素，两个屏幕截图按顺序排列，然后是一些代码：

创建类型化数据集以保存图表图像

将类型化数据集连接到RDLC报告

用于生成PDF并将其流式传输到浏览器的按钮单击代码

protected void btnPDF_Click(object sender, EventArgs e)
{
    //Put the image you want to display in a MemoryStream.  You can read an image from the file system
    //or generate an image, etc.  This example renders an image to a memory stream using a custom charting control.
    MemoryStream chtLoginsByMonthStream = new MemoryStream();
    this.chtLoginsByMonth.Save(chtLoginsByMonthStream, ImageFormat.Png);


    //Setup the datatable you will pass into the RDLC
    dsStudentUsage.dtUsageChartsDataTable dt = new dsStudentUsage.dtUsageChartsDataTable();
    dsStudentUsage.dtUsageChartsRow dr = dt.NewdtUsageChartsRow();

    //create new Byte Array, this will hold the image data from the memory stream
    byte[] chtLoginsByMonthArray = new byte[chtLoginsByMonthStream.Length];

    //Set pointer to the beginning of the stream
    chtLoginsByMonthStream.Position = 0;

    //Read the entire stream
    chtLoginsByMonthStream.Read(chtLoginsByMonthArray, 0, (int)chtLoginsByMonthStream.Length);

    //Put the byte array into the new datarow in the appropriate column
    dr["imgLoginsByMonth"] = chtLoginsByMonthArray;
    dt.Rows.Add(dr);

    //Add the data source to the report.
    ReportViewer1.LocalReport.DataSources.Add(new ReportDataSource("dsStudentUsage_dtUsageCharts", dt));

    //Setup objects for streaming the PDF to the browser
    Warning[] warnings;
    string[] streamids;
    string mimeType;
    string encoding;
    string extension;
    byte[] bytes;


    //Make a container for all of your report parameters
    var rptList = new List<KeyValuePair<string, string>>();
    rptList.Add(new KeyValuePair<string, string>("rpTotalLogins", "2,000"));
    //more parameters go here

    //Feed the report parameters into the actual "ReportParameters" class
    ReportParameter[] rptParams = new ReportParameter[rptList.Count];
    for (int i = 0; i < rptList.Count; i++)
    {
        rptParams[i] = new ReportParameter(rptList[i].Key, rptList[i].Value);
    }

    //Set parameters for the report.
    ReportViewer1.LocalReport.SetParameters(rptParams);

    //Render the report to a byte array in PDF format
    bytes = ReportViewer1.LocalReport.Render("PDF", null, out mimeType, out encoding, out extension, out streamids, out warnings);

    //Set the stream to either prompt user as file download or "inline" to stream
    //PDF directly into the browser window.

    HttpContext.Current.Response.AddHeader("Content-disposition", "attachment; filename=StudentUsageReport.pdf");
    //HttpContext.Current.Response.AddHeader("Content-disposition", "inline;");
    HttpContext.Current.Response.ContentType = "application/pdf";
    HttpContext.Current.Response.BinaryWrite(bytes);
    HttpContext.Current.Response.End();

}

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好吧，我刚想好。这个答案有三个要素，两个屏幕截图按顺序排列，然后是一些代码：

创建类型化数据集以保存图表图像

将类型化数据集连接到RDLC报告

用于生成PDF并将其流式传输到浏览器的按钮单击代码

protected void btnPDF_Click(object sender, EventArgs e)
{
    //Put the image you want to display in a MemoryStream.  You can read an image from the file system
    //or generate an image, etc.  This example renders an image to a memory stream using a custom charting control.
    MemoryStream chtLoginsByMonthStream = new MemoryStream();
    this.chtLoginsByMonth.Save(chtLoginsByMonthStream, ImageFormat.Png);


    //Setup the datatable you will pass into the RDLC
    dsStudentUsage.dtUsageChartsDataTable dt = new dsStudentUsage.dtUsageChartsDataTable();
    dsStudentUsage.dtUsageChartsRow dr = dt.NewdtUsageChartsRow();

    //create new Byte Array, this will hold the image data from the memory stream
    byte[] chtLoginsByMonthArray = new byte[chtLoginsByMonthStream.Length];

    //Set pointer to the beginning of the stream
    chtLoginsByMonthStream.Position = 0;

    //Read the entire stream
    chtLoginsByMonthStream.Read(chtLoginsByMonthArray, 0, (int)chtLoginsByMonthStream.Length);

    //Put the byte array into the new datarow in the appropriate column
    dr["imgLoginsByMonth"] = chtLoginsByMonthArray;
    dt.Rows.Add(dr);

    //Add the data source to the report.
    ReportViewer1.LocalReport.DataSources.Add(new ReportDataSource("dsStudentUsage_dtUsageCharts", dt));

    //Setup objects for streaming the PDF to the browser
    Warning[] warnings;
    string[] streamids;
    string mimeType;
    string encoding;
    string extension;
    byte[] bytes;


    //Make a container for all of your report parameters
    var rptList = new List<KeyValuePair<string, string>>();
    rptList.Add(new KeyValuePair<string, string>("rpTotalLogins", "2,000"));
    //more parameters go here

    //Feed the report parameters into the actual "ReportParameters" class
    ReportParameter[] rptParams = new ReportParameter[rptList.Count];
    for (int i = 0; i < rptList.Count; i++)
    {
        rptParams[i] = new ReportParameter(rptList[i].Key, rptList[i].Value);
    }

    //Set parameters for the report.
    ReportViewer1.LocalReport.SetParameters(rptParams);

    //Render the report to a byte array in PDF format
    bytes = ReportViewer1.LocalReport.Render("PDF", null, out mimeType, out encoding, out extension, out streamids, out warnings);

    //Set the stream to either prompt user as file download or "inline" to stream
    //PDF directly into the browser window.

    HttpContext.Current.Response.AddHeader("Content-disposition", "attachment; filename=StudentUsageReport.pdf");
    //HttpContext.Current.Response.AddHeader("Content-disposition", "inline;");
    HttpContext.Current.Response.ContentType = "application/pdf";
    HttpContext.Current.Response.BinaryWrite(bytes);
    HttpContext.Current.Response.End();

}

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你能在代码中使用PrintDocument类对一个正在运行的pdf编写器进行修改吗？@Paul，好主意，但这行不通，因为我们有多个图表以及一些其他变量数据。我需要使用reporting services构建一个PDF，我认为这会迫使我将所有图表保存为图像，或者将它们保存在数据库表或另一个PDF生成器中。你能在运行中使用PrintDocument类对PDF编写器进行编码吗？@Paul，好主意，但这行不通，因为我们有多个图表和一些其他变量数据。我需要使用reporting services构建PDF，我认为这会迫使我将所有图表保存为图像，或者将它们保存在数据库表或其他PDF生成器中。谢谢，但这是我呈现PDF的方式，而不是在不使用数据库的情况下添加图像的方式+1无论如何，因为这仍然很有用。谢谢，但这是我呈现PDF的方式，而不是在不使用数据库的情况下添加图像的方式+1无论如何，因为这仍然有用。史诗！这正是我想要的。能够在内存中构建数据集，并将数据库全部传递：叙事诗这正是我想要的。能够在内存中构建数据集，并将数据库全部传递：