一、综述
这里我要介绍的是如何使用VS2005中的ReportViewer控件动态显示需要绑定的报表(*.rdlc)。由于我们已经很习惯使用DataSet作为数据源去绑定类似于GridView或者DataGrid等控件,那么是否有方法将DataSet作为数据源就像绑定GridView这样去绑定报表呢?答案肯定的。
让我们先看下最简单的连接方法:Reporting Service使用dataset.xsd作为数据源,建立一个页面page.aspx对应一个reportviewer控件对应一张report.rdlc报表对应一个dataset.xsd数据源。运用这种模式,那么在VS2005中提供了一个强大的向导,只需按照向导操作,网上资料或者MSDN中都介绍的很详细如何使用这个向导,在此不再详细描述。
其次,也是我主要要介绍的,动态绑定到ado.net dataset:由于大部分数据都是采用ado.net dataset作为数据源绑定,如果使用提供的向导操作便不能进行动态绑定,对于后台操作非常不便,故不能使用向导操作。现在要设法动态绑定ado.net dataset到指定的report。
优点在于代码简单,操作灵活;
缺点在于设计report文件将变得非常令人头疼。
report文件是xml格式的,如果不使用向导那么就必须人为的去写这个xml文件(我研究了很久,没找到其他设计报表的方法,这麽写也是摸索出来的,掌握了就很方便了),特别当存储过程是动态的时候,设计这个报表的数据源将变得更为烦锁。但是同样的优点在于一切的问题只要掌握了如何去写这个文件,那么就等于解决了所有问题,独立性强。
二、使用WebForms ReportViewer控件
在一个WEB应用程序中,为了浏览在服务器上(report server)配置好的报表或者在本地文件系统(local file system)上的报表,你可以使用WebForms ReportViewer控件。
增加一个ReportViewer控件到一个Web应用程序
1、 增加一个新的Microsoft ASP.NET Web Site使用Microsoft Visual C# 或者 Microsoft Visual Basic。
2、 从工具箱中将ReportViewer控件拖到设计页面上,命名为reportViewer,当增加完之后,ReportViewer任务标签中会出现提示让你选择一个报表,此处可不去管它。
3、使用远程处理模式(Remote Processing Mode)浏览报表
下面的例子详细展示了如何提交一个报表存在于报表服务器上,这个例子使用Sales Order Detail Report。这张表报存在于SQL2005的示例(AdventureWorks)中,你只需安装SQL2005的示例,便能从里面找到,更详细信息关于示例,请看AdventureWorks Report Samples。
这个例子使用Windows综合认证,所以你必须首先在web.config中加入
<!-- Web.config file. --> <identity impersonate="true"/>
C#
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protected void Page_Init(object sender, EventArgs e)
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{
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if (!Page.IsPostBack)
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{
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// Set the processing mode for the ReportViewer to Remote
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reportViewer.ProcessingMode = ProcessingMode.Remote;
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ServerReport serverReport = reportViewer.ServerReport;
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// Set the report server URL and report path
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serverReport.ReportServerUrl =
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new Uri("http://localhost/reportserver");
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serverReport.ReportPath =
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"/AdventureWorks Sample Reports/Sales Order Detail";
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// Create the sales order number report parameter
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ReportParameter salesOrderNumber = new ReportParameter();
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salesOrderNumber.Name = "SalesOrderNumber";
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salesOrderNumber.Values.Add("SO43661");
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// Set the report parameters for the report
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reportViewer.ServerReport.SetParameters(
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new ReportParameter[]
{ salesOrderNumber });
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}
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}
VB
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Imports Microsoft.Reporting.WebForms
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Partial Class _DefaultClass _Default
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Inherits System.Web.UI.Page
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Protected Sub Page_Init()Sub Page_Init(ByVal sender As Object, _
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ByVal e As System.EventArgs) Handles Me.Init
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If Not Page.IsPostBack Then
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'Set the processing mode for the ReportViewer to Remote
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reportViewer.ProcessingMode = ProcessingMode.Remote
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Dim serverReport As ServerReport
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serverReport = reportViewer.ServerReport
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'Set the report server URL and report path
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serverReport.ReportServerUrl = _
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New Uri("http://localhost/reportserver")
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serverReport.ReportPath = _
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"/AdventureWorks Sample Reports/Sales Order Detail"
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'Create the sales order number report parameter
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Dim salesOrderNumber As New ReportParameter()
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salesOrderNumber.Name = "SalesOrderNumber"
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salesOrderNumber.Values.Add("SO43661")
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'Set the report parameters for the report
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Dim parameters() As ReportParameter = {salesOrderNumber}
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serverReport.SetParameters(parameters)
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End If
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End Sub
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End Class
4、使用本地处理模式(Local Processing Mode)浏览报表
这个例子同样使用了AdventureWorks Report Samples,你可以在本文章的最下面点击下载我做好的例子。
(1) 打开一个Web Site提供报表的增加
(2) 从菜单栏选择增加现有项
(3) 将C:\Program Files\Microsoft SQL Server\90\Samples\Reporting Services\Report Samples\AdventureWorks Sample Reports\ Sales Order Detail.rdl 报表文件加入项目
(4) 重命名Sales Order Detail.rdl为Sales Order Detail.rdlc
(5) 下面的例子将会在本地模式下建立一个dataset作为报表的数据源显示报表
C#
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protected void Page_Init(object sender, EventArgs e)
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{
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if (!Page.IsPostBack)
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{
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// Set the processing mode for the ReportViewer to Local
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reportViewer.ProcessingMode = ProcessingMode.Local;
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LocalReport localReport = reportViewer.LocalReport;
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localReport.ReportPath = "Sales Order Detail.rdlc";
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DataSet dataset = new DataSet("Sales Order Detail");
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string salesOrderNumber = "SO43661";
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GetSalesOrderData(salesOrderNumber, ref dataset);
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ReportDataSource dsSalesOrder = new ReportDataSource();
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dsSalesOrder.Name = "SalesOrder";
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dsSalesOrder.Value = dataset.Tables["SalesOrder"];
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localReport.DataSources.Add(dsSalesOrder);
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GetSalesOrderDetailData(salesOrderNumber, ref dataset);
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ReportDataSource dsSalesOrderDetail = new ReportDataSource();
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dsSalesOrderDetail.Name = "SalesOrderDetail";
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dsSalesOrderDetail.Value = dataset.Tables["SalesOrderDetail"];
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localReport.DataSources.Add(dsSalesOrderDetail);
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// Create the sales order number report parameter
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ReportParameter rpSalesOrderNumber = new ReportParameter();
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rpSalesOrderNumber.Name = "SalesOrderNumber";
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rpSalesOrderNumber.Values.Add("SO43661");
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// Set the report parameters for the report
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localReport.SetParameters(
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new ReportParameter[]
{ rpSalesOrderNumber });
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}
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}
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private void GetSalesOrderData(string salesOrderNumber,
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ref DataSet dsSalesOrder)
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{
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string sqlSalesOrder =
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"SELECT SOH.SalesOrderNumber, S.Name AS Store, " +
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" SOH.OrderDate, C.FirstName AS SalesFirstName, " +
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" C.LastName AS SalesLastName, E.Title AS " +
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" SalesTitle, SOH.PurchaseOrderNumber, " +
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" SM.Name AS ShipMethod, BA.AddressLine1 " +
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" AS BillAddress1, BA.AddressLine2 AS " +
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" BillAddress2, BA.City AS BillCity, " +
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" BA.PostalCode AS BillPostalCode, BSP.Name " +
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" AS BillStateProvince, BCR.Name AS " +
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" BillCountryRegion, SA.AddressLine1 AS " +
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" ShipAddress1, SA.AddressLine2 AS " +
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" ShipAddress2, SA.City AS ShipCity, " +
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" SA.PostalCode AS ShipPostalCode, SSP.Name " +
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" AS ShipStateProvince, SCR.Name AS " +
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" ShipCountryRegion, CC.Phone AS CustPhone, " +
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" CC.FirstName AS CustFirstName, CC.LastName " +
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" AS CustLastName " +
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"FROM Person.Address SA INNER JOIN " +
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" Person.StateProvince SSP ON " +
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" SA.StateProvinceID = SSP.StateProvinceID " +
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" INNER JOIN Person.CountryRegion SCR ON " +
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" SSP.CountryRegionCode = SCR.CountryRegionCode " +
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" RIGHT OUTER JOIN Sales.SalesOrderHeader SOH " +
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" LEFT OUTER JOIN Person.Contact CC ON " +
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" SOH.ContactID = CC.ContactID LEFT OUTER JOIN" +
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" Person.Address BA INNER JOIN " +
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" Person.StateProvince BSP ON " +
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" BA.StateProvinceID = BSP.StateProvinceID " +
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" INNER JOIN Person.CountryRegion BCR ON " +
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" BSP.CountryRegionCode = " +
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" BCR.CountryRegionCode ON SOH.BillToAddressID " +
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" = BA.AddressID ON SA.AddressID = " +
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" SOH.ShipToAddressID LEFT OUTER JOIN " +
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" Person.Contact C RIGHT OUTER JOIN " +
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" HumanResources.Employee E ON C.ContactID = " +
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" E.ContactID ON SOH.SalesPersonID = " +
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" E.EmployeeID LEFT OUTER JOIN " +
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" Purchasing.ShipMethod SM ON SOH.ShipMethodID " +
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" = SM.ShipMethodID LEFT OUTER JOIN Sales.Store" +
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" S ON SOH.CustomerID = S.CustomerID " +
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"WHERE (SOH.SalesOrderNumber = @SalesOrderNumber)";
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SqlConnection connection = new
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SqlConnection("Data Source=(local); " +
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"Initial Catalog=AdventureWorks; " +
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"Integrated Security=SSPI");
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SqlCommand command =
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new SqlCommand(sqlSalesOrder, connection);
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command.Parameters.Add(
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new SqlParameter("SalesOrderNumber",
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salesOrderNumber));
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SqlDataAdapter salesOrderAdapter = new
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SqlDataAdapter(command);
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salesOrderAdapter.Fill(dsSalesOrder, "SalesOrder");
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}
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private void GetSalesOrderDetailData(string salesOrderNumber,
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ref DataSet dsSalesOrder)
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{
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string sqlSalesOrderDetail =
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"SELECT SOD.SalesOrderDetailID, SOD.OrderQty, " +
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" SOD.UnitPrice, CASE WHEN " +
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" SOD.UnitPriceDiscount IS NULL THEN 0 " +
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" ELSE SOD.UnitPriceDiscount END AS " +
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" UnitPriceDiscount, SOD.LineTotal, " +
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" SOD.CarrierTrackingNumber, " +
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" SOD.SalesOrderID, P.Name, P.ProductNumber " +
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"FROM Sales.SalesOrderDetail SOD INNER JOIN " +
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" Production.Product P ON SOD.ProductID = " +
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" P.ProductID INNER JOIN " +
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" Sales.SalesOrderHeader SOH ON " +
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" SOD.SalesOrderID = SOH.SalesOrderID " +
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"WHERE (SOH.SalesOrderNumber = @SalesOrderNumber) " +
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"ORDER BY SOD.SalesOrderDetailID";
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using (SqlConnection connection = new
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SqlConnection("Data Source=(local); " +
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"Initial Catalog=AdventureWorks; " +
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"Integrated Security=SSPI"))
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{
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SqlCommand command =
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new SqlCommand(sqlSalesOrderDetail, connection);
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command.Parameters.Add(
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new SqlParameter("SalesOrderNumber",
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salesOrderNumber));
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SqlDataAdapter salesOrderDetailAdapter = new
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SqlDataAdapter(command);
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salesOrderDetailAdapter.Fill(dsSalesOrder,
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"SalesOrderDetail");
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}
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}
VB
Imports System.Data
Imports System.Data.SqlClient
Imports Microsoft.Reporting.WebForms


Partial Class _DefaultClass _Default
Inherits System.Web.UI.Page


Protected Sub Page_Init()Sub Page_Init(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles Me.Init

If Not Page.IsPostBack Then

'Set the processing mode for the ReportViewer to Local
reportViewer.ProcessingMode = ProcessingMode.Local

Dim localReport As LocalReport
localReport = reportViewer.LocalReport

localReport.ReportPath = "Sales Order Detail.rdlc"

Dim dataset As New DataSet("Sales Order Detail")

Dim salesOrderNumber As String = "SO43661"

'