Reporting Services chart text is blurry when rendered in ReportViewer control on web page

`So I had to change the way an ASP.NET 2.0 application called reports from pages. Originally, I used JavaScript to open a new window.

ViewCostReport.OnClientClick = "window.open('" + Report.GetProjectCostURL(_PromotionID) + "','ProjectCost','resizable=yes')";

The issue I had was that the window.open call would only work within the client network and not on a new web server located in their DMZ. I had to create a new report WebForm that embedded a ReportViewer control to view the reports.

The other issue I had is that the Report Server had to be accessed with windows Authentication since it was being used by another application for reports and that app used roles for report access. So off I went to get my ReportViewer control to impersonate a windows user. I found the solution to be this:

Create a new class which implements the Microsoft.Reporting.WebForms.IReportServerCredentials interface for accessing the reports.

public class ReportCredentials : Microsoft.Reporting.WebForms.IReportServerCredentials
{
    string _userName, _password, _domain;
    public ReportCredentials(string userName, string password, string domain)
    {
        _userName = userName;
        _password = password;
        _domain = domain;
    }

    public System.Security.Principal.WindowsIdentity ImpersonationUser
    {
        get
        {
            return null;
        }
    }

    public System.Net.ICredentials NetworkCredentials
    {
        get
        {
            return new System.Net.NetworkCredential(_userName, _password, _domain);
        }
    }

    public bool GetFormsCredentials(out System.Net.Cookie authCoki, out string userName, out string password, out string authority)
    {
        userName = _userName;
        password = _password;
        authority = _domain;
        authCoki = new System.Net.Cookie(".ASPXAUTH", ".ASPXAUTH", "/", "Domain");
        return true;
    }
}

Then I created an event for the button to call the report:

protected void btnReport_Click(object sender, EventArgs e)
{
    ReportParameter[] parm = new ReportParameter[1];
    parm[0] =new ReportParameter("PromotionID",_PromotionID);
    ReportViewer.ShowCredentialPrompts = false;
    ReportViewer.ServerReport.ReportServerCredentials = new ReportCredentials("Username", "Password", "Domain");
    ReportViewer.ProcessingMode = Microsoft.Reporting.WebForms.ProcessingMode.Remote;
    ReportViewer.ServerReport.ReportServerUrl = new System.Uri("http://ReportServer/ReportServer");
    ReportViewer.ServerReport.ReportPath = "/ReportFolder/ReportName";
    ReportViewer.ServerReport.SetParameters(parm);
    ReportViewer.ServerReport.Refresh();
}

I've found the issue, or rather two issues:

• I needed to have a ScriptManager on the page. Creating a completely new project with the above test webpage threw the error about the ScriptManager requirement, although a test page in the original project (and indeed, my original production page) didn't complain about the missing ScriptManager. I must have deleted the original ScriptManager by mistake. To fix it, all I needed to add was:

  <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
  

• Secondly - and this was in the production code itself - I had the parameter

  ShowParameterPrompts="True"

  With this option defined, the page wouldn't load, giving the same error as above. However, removing that option allowed the page to load normally.