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Passing Parameters with silverlight?

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Niclas Pehrsson asked on 21 Apr 2010, 04:34 PM

I want to pass some arguments from the server to the Report for sub selecting of data. I have looked in this forums and found one thread were the suggestion were to do this but I can't get it to work. On the Client aside I do following.

    
                    public MainPage() 
        
                    { 
        
                        InitializeComponent(); 
        
                        reportViewer1.RenderBegin += RenderBegin1; 
        
                    } 
        
                    private void RenderBegin1(object sender, RenderBeginEventArgs args) 
        
                    { 
        
                        args.ParameterValues["StartDate"] = DateTime.Now; 
        
                        args.ParameterValues["Andra"] = "fff"; 
        
                    }

And in the report:

    
                private void NeedDataSource1(object sender, EventArgs e) 
        
                    { 
        
                        var items = this.ReportParameters; 
        
                        var list = new List<Person>(); 
        
                        for (var i = 0; i < 100; i++) 
        
                        { 
        
                            list.Add(new Person() {LastName = "Last1", FirstName = "First1"}); 
        
                            list.Add(new Person() { LastName = "Last2", FirstName = "First2" });        
        
                        } 
        
                        this.DataSource = list; 
        
                    }

Each method will run but Reportparameters is empty?? Am I doing something wrong?

12 Answers, 1 is accepted

answered on 22 Apr 2010, 02:13 PM

I think I may have solved it, it seems like I need to do this in the constructor

    
              this.ReportParameters.Add("StartDate", ReportParameterType.DateTime, null);

And hook in the event ItemDataBinding instead.
I would like more documentation on this.

I'm also looking for a more cleaner way to handle reports, I think it's kind of ugly to let the report file access the data layer directly. And even if it need to do it I would like to use dependency injection through the constructor or properties to be able to give the access to the report which its need.. for example be able to hook up an dependency injection framework in the wcf service.

answered on 16 Jun 2011, 06:30 AM

Hello,

sorry for the late reply as i was not accessing this account for few months.

i will share my approach of passing multiple parameters to reportviewer from xaml page.

I have added a separate page called Report.aspx to the web application project which is responsible to create a reportbook and attach the report document to it.

From Xaml page - I call this page on the click of "generate report" button.
I pass the parameters in the querystring as -

HtmlPage.Window.Navigate(new Uri("Report.aspx?Keyword=" + txtKeyword.Text + "&ObjectName=" + objectName + "&ObjectTypes=" + objTypeStr + "&Guid=" + guid + "", UriKind.Relative), "_blank");

here, ObjectTypes is the string of concatenated values from the list as i wanted to pass multiple values for this paremater. As per my previous posts to the telerik team, there was no other alternative but to pass multiple values concatenated in a single string and then seperate out the values in the report file using split function.

To acheive this,

i have written this code in the pade_load of Report.aspx -

//Get the report parameters from the querystring.

            string keyword = Server.UrlDecode(this.Request.QueryString["Keyword"]);
            string objectName = Server.UrlDecode(this.Request.QueryString["ObjectName"]);
            string objectTypes = Server.UrlDecode(this.Request.QueryString["ObjectTypes"]);
            string guid = Server.UrlDecode(this.Request.QueryString["Guid"]);

//The multiple values are separated out from the string objectTypes and then have used these values to generate different reports.
string[] objectTypeArr = objectTypes.Split(new char[] { '.' });

I hope this post will help someone acheive similar task.

Regards.