如何传递参数的ReportViewer？ [英] How can I pass parameter to Reportviewer?

问题描述

我试图创造TOP报告（可根据用户提供说10,100,200 ..）产品。我是90％的成功与它。现在，我发现困难，显示此号码报告标题。所以，我的报告标题说热门产品，现在我想使这个充满活力的，说100强的产品，一流的产品200。

I am trying to create report for TOP (according to user provide say 10,100,200..) products. I am 90% success with it. Now, I am finding difficulties to show this numbers to Report header. So, my report header is saying Top Products, now I want to make this dynamic, saying Top 100 Products, Top 200 Products.

我使用VS 2008。

I AM USING VS 2008.

对于这一点，我的ReportViewer创建参数。我试着在Page_Load事件这个code;

For this, I created parameter in ReportViewer. I tried this code in Page_Load event ;

 protected void Page_Load(object sender, EventArgs e)
{
    ReportDataSource rds = new ReportDataSource("SP_GetProductsbySales_DataSet");
    //ReportViewer1.ServerReport.ReportPath = "Report1.rdlc";
    ReportViewer1.LocalReport.ReportPath = "Report1.rdlc";
    ReportParameter[] param = new ReportParameter[1];
    param[0] = new ReportParameter("top", "100");

    ReportViewer1.ServerReport.SetParameters(param);
    ReportViewer1.ServerReport.Refresh();
}

但得到错误说：尚未指定报表定义的源

我怎样才能做到这一点呢？我试图为观看一些影片，以谷歌为好，但还是我没有得到任何想法。

How can I accomplish this one? I tried to google as well as watched some videos, but still I am not getting any idea.

感谢。

推荐答案

您可以在报表中设置一个前pression显示值。

You can set an expression in your report to show the value.

这位前pression将如下：

The expression would be as follows:

="Top " & Parameters!top.Value & " Products"

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