在ASP.net页上的SSRS报告中正确传递我的参数

Question

I'm pretty close to figuring out an issue I've spent days on.

I'm trying to pass parameters to a SSRS report on an ASP.net page. The user selects 2 options on the page before, the program (drop down list of 3 programs) and the period (date).

I can get something to pass but not what I want. Here's the page where the user chooses what to display on the report:

        ClientScript.RegisterStartupScript(this.GetType(), "Alert", "alert('Bill Created!');window.open('../demographics/supbillrpt.aspx?prog=fprogram&period=cperiod','_self');", true);

fprogram is:

        SqlParameter param2 = new SqlParameter();
        param2 = command.Parameters.Add("@program", SqlDbType.Char);
        param2.Value = fprogram;

cperiod is the same thing but it is a date.

Here's the code behind on the page that displays the report:

        String sprogram = Request.QueryString[0];
        String speriod = Request.QueryString[1];

        ReportViewer1.ProcessingMode = ProcessingMode.Remote;
        ReportViewer1.Width = 800;
        ReportViewer1.Height = 600;
        IReportServerCredentials irsc = new CustomReportCredentials();
        ReportViewer1.ServerReport.ReportServerCredentials = irsc;
        ReportViewer1.ServerReport.ReportPath = "/sup_billing/Report1";
        ReportViewer1.ServerReport.Refresh();
        ReportParameter p = new ReportParameter("prog", sprogram);                      ReportViewer1.ServerReport.SetParameters(new ReportParameter[] { p });
        ReportParameter p2 = new ReportParameter("period", speriod); ReportViewer1.ServerReport.SetParameters(new ReportParameter[] { p2 });

And what I get is the program being blank and the period says "cperiod"

I've tried a few different things to get it to read it as a variable but nothing seems to be working.

IF I put the following in:

ClientScript.RegisterStartupScript(this.GetType(), "Alert", "alert('Bill Created!');window.open('../demographics/supbillrpt.aspx?prog=VEX&period=cperiod','_self');", true);

VEX is an item on that dropdown list and will show up because I put it there like that. But the user won't always select VEX so I need to use the fprogram variable. Any suggestions?

Answer 1

I'm assuming your first code fragment is the actual code you're using, rather than a mock-up of the general form of the code. I am further assuming that you have variables called fprogram and cperiod .

You need to build your query string to reflect the exact values you wish to pass. You cannot, unfortunately, code the name of the variable you want to use as the source of the value and have the actual value be inserted.

So your code should look something like this:

// I am assuming you're getting your fprogram and cperiod values from controls.  The 
// control names are of course up to you.

string fprogram = ddlProgram.SelectedValue;
string cperiod =  txtPeriod.Text;  // I'm assuming this contains a formatted date.

string queryString = String.Format(
     "../demographics/supbillrpt.aspx?prog={0}&period={1}", 
     fprogram, 
     cperiod);
string script = String.Format(
     "alert('Bill Created!');window.open('{0}','_self');",
     queryString);

ClientScript.RegisterStartupScript(this.GetType(), "Alert", script, true);

Hope this helps.