使用实体框架在 Crystal Reports 中显示 GridView 的一条记录

Question

Scenario:

I have a Gridview with some records which read from SQL Database, each record of Gridview has a button that use CommandName and CommandArgument with sending '<%#Eval("UserId")%>' to detecting each record with calling them in code behind (CS).

Goal:

I want to use entity command to when i click on the button ( DO_PRINT(LinkButton) ), the crystal report pop up showing content of just same record.

Gridview like this:

UserId    Name   LastName   OfficeId    Print
100       Hassan Hosseini      1        DO_PRINT(LinkButton)
200       Brad   Pitt          2        DO_PRINT(LinkButton)

Thank you in advance

Answer 1

You just need to set the href of the link to a page hosting a crystal report viewer showing a report and in page load of the page, setup data source using the entity Id that you receive from query string or route.

Crystal Reports with Entity Framework - Pass data to report

1. Create a ASP.NET WebForms Project
2. Add a new Database to App_Data folder, name it SampleDatabase

3. Add a new table to the sample database, name it Products :

    CREATE TABLE [dbo].[Prodcts] ( [Id] INT NOT NULL PRIMARY KEY IDENTITY(1,1), [Name] NVARCHAR(50) NOT NULL, [Price] INT NOT NULL, [Description] NVARCHAR(500) NULL )

4. Add a few records to table. (Otherwise the GridView will not be shown).

5. Add a new entity data model to your project and name it SampleDatabase

6. Create a new page names Products.aspx and add a new GridView to the page using the following configs:

    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"> <Columns> <asp:BoundField DataField="Name" HeaderText="Name"/> <asp:BoundField DataField="Price" HeaderText="Price"/> <asp:BoundField DataField="Description" HeaderText="Description"/> <asp:HyperLinkField DataNavigateUrlFields="Id" DataNavigateUrlFormatString="~\\Report.aspx?Id={0}" HeaderText="Report" Text="Report" /> </Columns> </asp:GridView>

7. Load data into the grid, in the code behind:

    protected void Page_Load(object sender, EventArgs e) { using (var db = new SampleDatabaseEntities()) { var data = db.Prodcts.ToList(); GridView1.DataSource = data; GridView1.DataBind(); } }

8. Add a new Crystal Report to the project, name it ProductReport :

   • Add New Item → Crystal Reports → Using the Report Wizard / Standard
   • Then from Available Data Sources: → Project Data → .NET Objects → Find and choose the Product and add it to the right panel
   • Then follow the wizard

9. Add a new page named Report.aspx and drop an instance of the ReportViwer to the page, using the default name CrystalReportViewer1 .

10. In the code behind of the Report.aspx , get the report and the data to show in report:

     protected void Page_Load(object sender, EventArgs e) { if (int.TryParse(Request.QueryString["id"], out int id)) { using (var db = new SampleDatabaseEntities()) { var report = new ProductReport(); var data = db.Prodcts.Where(x => x.Id == id).ToList(); report.SetDataSource(data); CrystalReportViewer1.ReportSource = report; CrystalReportViewer1.RefreshReport(); } } }

Note: In case you had some script error preventing the report viewer from showing, you can copy C:\\inetpub\\wwwroot\\aspnet_client folder to your project.