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如何在CRM系统中集成ActiveReports最终报表设计器

有时候,将设计器集成到业务系统中,为用户提供一些自定义的数据表,用户不需要了解如何底层的逻辑关系和后台代码,只需要选择几张关联的数据表,我们会根据用户的选择生成可供用户直接使用的数据集。本文第一部分主要讲解了,如何构造三种报表模板和,第二部分主要讲解了对于DataRelation类在动态绑定数据集之间的用法。首先需要构造LayoutBuilder类,该类主要构造三种类型的报表以及为它们添加数据集字段。

如何在CRM系统中集成ActiveReports最终报表设计器

1. 创建RDL 报表

使用PageReport对象,并添加属性

public static void BuildRdlReportLayout(Design.Designer designer)         {             PageReport report = new PageReport();              report.Report.Body.Height = "5cm";             report.Report.Width = "20cm";                 report.Load(new StringReader(report.ToRdlString()));              //report = LayoutBuilder.AddDataSetDataSource(report);//Adding DataSources to the PageReport object             report = LayoutBuilder.addDataSet(report);             MemoryStream reportStream = LayoutBuilder.LoadReportToStream(report);//Loading the PageReport object to a stream             reportStream.Position = 0;               designer.LoadReport(XmlReader.Create(reportStream), DesignerReportType.Page);         }

2. 创建页面报表

页面报表使用页面报表的构造字符串的方式来创建,否则会默认生成RDL报表

// 创建页面报表         public static void BuildPageReportLayout(Design.Designer designer)         {             PageReport report = new PageReport();             report.Load(new StringReader(               @"<Report xmlns=""http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"">                 <Body>                     <Height>27.9cm</Height>                     <ReportItems>                         <FixedPage Name=""FixedPage1"">                             <Pages>                                 <Page />                             </Pages>                         </FixedPage>                     </ReportItems>                 </Body>                 <BottomMargin>2.5cm</BottomMargin>                 <LeftMargin>2.5cm</LeftMargin>                 <PageHeight>27.9cm</PageHeight>                 <PageWidth>21.6cm</PageWidth>                 <RightMargin>2.5cm</RightMargin>                 <TopMargin>2.5cm</TopMargin>                 <Width>21.6cm</Width>                   </Report>"));              report = LayoutBuilder.AddDataSetDataSource(report);//Adding DataSources to the PageReport object             MemoryStream reportStream = LayoutBuilder.LoadReportToStream(report);//Loading the PageReport object to a stream             reportStream.Position = 0;              designer.LoadReport(XmlReader.Create(reportStream), DesignerReportType.Page);         }

3. 页面报表和RDL添加数据方法

因为页面报表和RDL报表从代码级别而言,是相同的,都被视为PageReport,所以对于页面报表和RDL报表执行的类和接口也都相同。

添加数据集采用的是绑定预先设计的字段,因为在使用过程中用户只需要使用现成的数据来设计报表,所以我们需要为报表预先绑定好可以使用的字段,代码如下:

public static PageReport AddDataSetDataSource(PageReport report)         {             // create DataSource for the report             DataSource dataSource = new DataSource();             dataSource.Name = "Reels Database";             dataSource.ConnectionProperties.DataProvider = "DATASET";             dataSource.ConnectionProperties.ConnectString = "";              //Create DataSet with specified query and load database fields to the DataSet             DataSet dataSet = new DataSet();             Query query = new Query();             dataSet.Name = "Sample DataSet";             query.DataSourceName = "Reels Database";             query.CommandType = QueryCommandType.Text;             query.CommandText = "";             dataSet.Query = query;             String[] fieldsList = new String[] { "MoviedID", "Title", "YearReleased", "MPAA" };             foreach (string fieldName in fieldsList)             {                 Field field = new Field(fieldName, fieldName, null);                 dataSet.Fields.Add(field);             }             //create report definition with specified DataSet and DataSource             report.Report.DataSources.Add(dataSource);             report.Report.DataSets.Add(dataSet);             return report;         }

4. 创建区域报表及添加数据:

区域报表的创建方式与页面报表类似,采用字符串读取的形式,并直接添加数据字段。

public static void BuildSectionReportLayout(Design.Designer designer)         {             // 空白区域报表             string rpx = "<?xml version=/"1.0/" encoding=/"utf-8/"?> <ActiveReportsLayout Version=/"3.2/" PrintWidth=/"9360/" DocumentName=/"ActiveReports Document/" ScriptLang=/"C#/" MasterReport=/"0/">                              <StyleSheet>                                <Style Name=/"Normal/" Value=/"font-family: Arial; font-style: normal; text-decoration: none; font-weight: normal; font-size: 10pt; color: Black; text-align: left; vertical-align: top; ddo-char-set: 1/" />                                <Style Name=/"Heading1/" Value=/"font-family: Arial; font-size: 16pt; font-style: normal; font-weight: bold/" />                                <Style Name=/"Heading2/" Value=/"font-family: Times New Roman; font-size: 14pt; font-style: italic; font-weight: bold/" />                                <Style Name=/"Heading3/" Value=/"font-family: Arial; font-size: 13pt; font-style: normal; font-weight: bold/" />                              </StyleSheet>                              <Sections>                                <Section Type=/"PageHeader/" Name=/"PageHeader1/" Height=/"360/" BackColor=/"16777215/" />                                <Section Type=/"Detail/" Name=/"Detail1/" Height=/"2880/" BackColor=/"16777215/" />                                <Section Type=/"PageFooter/" Name=/"PageFooter1/" Height=/"360/" BackColor=/"16777215/" />                              </Sections>                              <ReportComponentTray />                              <PageSettings />                              <Parameters />                            </ActiveReportsLayout>";              // 区域报表数据源结构             System.Data.DataTable dt = new System.Data.DataTable();             dt.Columns.Add("Col1");             dt.Columns.Add("Col2");             dt.Columns.Add("Col3");              designer.Report = null;              // 加载区域报表到设计器             designer.LoadReport(XmlReader.Create(LayoutBuilder.CovertStringToStream(rpx)), DesignerReportType.Section);              // 设置区域报表数据源             SectionReport sr2 = designer.Report as SectionReport;             sr2.DataSource = dt;         }

5. 修改ReportsForm_Load 方法

LayoutBuilder.BuildRdlReportLayout(this.reportDesigner);
这样打开设计器之后,则会呈现带字段的数据集,当用户可以直接使用数据集字段,设计满足需求的报表了,当用户设计完成可能需要预览报表,这样就需要为报表返回实际的数据了。
首先在报表设计器中添加“预览”按钮
// 添加预览报表菜单             fileMenu.DropDownItems.Add(new ToolStripMenuItem("预览", null, new EventHandler(OnViewReport)));
实现预览方法,将当前设计的报表传给ReportViewer:
private void OnViewReport(object sender, EventArgs e)         {             ReportViewer viewer = new ReportViewer();             viewer.Report = reportDesigner.Report;             viewer.ReportType = reportDesigner.ReportType;             viewer.ShowDialog();         }
获取到保镖对象后,通过LocateDataSource来绑定字段:
switch (ReportType)             {                 case DesignerReportType.Page:                     PageReport report1 = Report as PageReport;                                         viewer1.LoadDocument(report1.Document);                     break;                 case DesignerReportType.Rdl:                     PageReport report2 = Report as PageReport;                     PageDocument reportD = new PageDocument(report2);                     reportD.LocateDataSource += new LocateDataSourceEventHandler(LoadDataSet);                     viewer1.LoadDocument(reportD);                     break;
其中我们在DataSet中使用了DataRelation 对象,用来创建Table之间的关系,但是AR对DataRelation的支持只限于父级数据的访问。

访问父数据表的字段时,字段的前缀应该为合适的数据表的关系名称,使用“.”进行分割。举例说明,有一个数据表OrderDetails作为子表关联到数据表Orders,两个数据表之间的关系名称为Orders_OrderDetails。可以使用下面的语法访问父数据表的字段OrderDate:Orders_OrderDetails.OrderDate

使用同样的语法可以访问嵌套多层的数据表字段。如,上例中的数据表Orders也存在父数据表Customers,关系名称为Customers_orders。命令行文本中指定数据表OrderDetails为主表,使用下面的语法访问父数据表的字段CustomerName:Customers_Orders.Orders_OrderDetails.CustomerName

注:当字段名称和关系使用相同名称时会发生错误,暂时不支持。

private void LoadDataSet(object sender, LocateDataSourceEventArgs args)         {            string constr = @"Provider=sqloledb; password=xA123456;data source=10.32.2.28;initial catalog=NWind_CHS;user id=sa;";                         //此处修改为AR的测试数据库             // 创建DataSet            DataSet myDataSet = new DataSet();            //string connStr = Properties.Resources.ConnectionString;            OleDbConnection conn = new OleDbConnection(constr);            DataTable[] myDataTables = new DataTable[3];            myDataTables[0] = new DataTable(Constants.SaleTableName);            myDataTables[1] = new DataTable(Constants.SaleDetailsTableName);            myDataTables[2] = new DataTable(Constants.CustomerTableName);                         //创建DataTable                myDataSet.Tables.Add(myDataTables[0]);            OleDbCommand cmd1 = new OleDbCommand(Constants.cmdText1, conn);            OleDbDataAdapter oleAdapter1 = new OleDbDataAdapter(cmd1);            oleAdapter1.Fill(myDataSet.Tables[0]);             //为Table 添加数据            myDataSet.Tables.Add(myDataTables[1]);            OleDbCommand cmd2 = new OleDbCommand(Constants.cmdText2, conn);            OleDbDataAdapter oleAdapter2 = new OleDbDataAdapter(cmd2);            oleAdapter2.Fill(myDataSet.Tables[1]);             //为Table 添加数据            myDataSet.Tables.Add(myDataTables[2]);            OleDbCommand cmd3 = new OleDbCommand(Constants.cmdText3, conn);            OleDbDataAdapter oleAdapter3 = new OleDbDataAdapter(cmd3);            oleAdapter3.Fill(myDataSet.Tables[2]);              //创建 “DataRelation Customers_Orders”            DataRelation Customers_Orders = new DataRelation("C_O",myDataSet.Tables[2].Columns["客户ID"],                myDataSet.Tables[0].Columns["客户ID"] );            myDataSet.Relations.Add(Customers_Orders);                        //创建 “DataRelation ”            DataRelation Orders_OrderDetails = new DataRelation("O_OD ", myDataSet.Tables[0].Columns["订单ID"],                               myDataSet.Tables[1].Columns["订单ID"]);            myDataSet.Relations.Add(Orders_OrderDetails);                                           //返回从表数据             args.Data = myDataSet.Tables[0];
原文  http://www.cnblogs.com/powertoolsteam/p/EndUserDesigner.html
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