引用：海风吹的专栏
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在做报表项目时,有时不仅要满足用户的需求,而且要求软件要有一定的适应性,这就往往就要求报表要动态地生成. 最近在做一个项目时,就碰到这样子的问题.系统要在不现的地区使用,不同的地区下属单位是不一样的,而报表中有列就是显示下属单位的某一属性的.因而报表中的这一项不公名称不能确定,数目也不能定.所以它要求在生成过程中动态地改变报表中的格式. 这个项目是用.NET的C#开发的,报表用微软的RDLC模板报表. RDLC 是用XML文档定义报表格式,这样就很容易想到通过更改XML文档元素内容来实现这一需求. 报表中实现了多列表头以及向报表中动态添加列增加参数据等内容. 使用方法： private void ProressAllXiangZhen() 
{ 
string sql = null; string filename = Application.StartupPath + "\\ChecksMonthAll.rdlc";//报表定义文件地址 ReportXml Rex = new ReportXml(destname);//创建XML操作对象 XiangZhenEx xz = new XiangZhenEx();//强类型数据集 xz = (new XiangZhenBL()).GetAllXiangZhen(); //根据数据表值，修改报表格式 foreach (DataRow row in xz._XiangZhen.Rows)//每镇增加两列当月所得及年累计值
{ string code = row["code"].ToString(); string name = row["name"].ToString(); //系统提示 UpStatus(string.Format("设置乡镇{0}报表格式", name)); //增加参数 Rex.AddParamter("Params" + code, "String", name); //增加字段 Rex.AddDataSetColumn("Month_" + code + "Region", "System.Decimal"); Rex.AddTableColumn("2.5cm"); Rex.AddDataSetColumn("Year_" + code + "Region", "System.Decimal"); Rex.AddTableColumn("2.5cm"); //增加表头第一行，跨列居中 Rex.AddTableHaderFirstRowCell("Heade" + code + "01", String.Format("=Parameters!{0}.Value", "Params" + code)); //增加表头第二行，加两列与上对齐 Rex.AddTableHaderSecondRowCell("Heade" + code + "0101", "当月"); Rex.AddTableHaderSecondRowCell("Heade" + code + "0102", "全年"); //增加详细数据行列 Rex.AddDetailsCell("Detail" + code + "01", String.Format("=Fields!{0}.Value", "Month_" + code + "Region")); Rex.AddDetailsCell("Detail" + code + "02", String.Format("=Fields!{0}.Value", "Year_" + code + "Region")); sql += "," + String.Format("dbo.Get_Month_Region('{0}',{1},{2},shui_code,{3}) as \"{4}\"", code, m_year, m_month, m_item2, "Month_" + code + "Region"); sql += "," + String.Format("dbo.Get_Year_Region('{0}',{1},{2},shui_code,{3}) as \"{4}\"", code, m_year, m_month, m_item2, "Year_" + code + "Region"); if (row["name"].ToString() == "市直" || row["name"].ToString() == "县直") AddXiangZhenHeJi(Rex, xz._XiangZhen.Rows);
} UpStatus("调整报表宽度"); Int32 width = (xz._XiangZhen.Rows.Count+1) * 5; Rex.EditPageHeaderTb28Width(width); Rex.EditPageHeaderTb29Left(width); Rex.EditPageFooterLineWidth("line1", width); Rex.EditPageFooterLineWidth("line2", width); sql = string.Format("select acctname,sum(money)money,bili,sum(country_get)country_get," + "sum(province_get)province_get,sum(region_get)region_get," + "shui_code " + sql + " from v_report_month_allzhen where " + "year={0} and month={1} and item IN({2})" + " group by shui_code,bili,acctname", m_year, m_month, m_item); System.Diagnostics.Debug.WriteLine(sql); UpStatus(string.Format("正在取此数据，大概需要2-3分钟")); ReportBl BL = new ReportBl(); DataSet re = BL.GetMonthReport(sql); UpStatus("已经取得数据，正在加载报表数据"); this.reportViewer.ProcessingMode = ProcessingMode.Local; this.reportViewer.LocalReport.DataSources.Clear(); Microsoft.Reporting.WinForms.ReportDataSource RD = new Microsoft.Reporting.WinForms.ReportDataSource("ReportDT_v_report_month", re.Tables[0]); this.reportViewer.LocalReport.DataSources.Add(RD); ReportParameter[] cc = new ReportParameter[xz._XiangZhen.Rows.Count + 4]; for (int i = 0; i < xz._XiangZhen.Rows.Count; i++)//每镇增加两列当月所得及年累计值 { DataRow row = xz._XiangZhen.Rows[i]; string code = row["code"].ToString(); string name = row["name"].ToString(); cc[i] = new ReportParameter("Params" + code, name); } UpStatus("设置报表参数"); this.reportViewer.LocalReport.ReportPath = destname; cc[xz._XiangZhen.Rows.Count] = new ReportParameter("dwmc", "全县"); cc[xz._XiangZhen.Rows.Count + 1] = new ReportParameter("date", string.Format("{0}年{1}月", m_year, m_month)); cc[xz._XiangZhen.Rows.Count + 2] = new ReportParameter("shou_item", m_item.Replace('\'', ' ').Replace(',', '、')); cc[xz._XiangZhen.Rows.Count + 3] = new ReportParameter("Params100", "乡镇小计"); this.reportViewer.LocalReport.SetParameters(cc); UpStatus("就绪"); this.reportViewer.RefreshReport(); 
} 类代码示例(报表操作类ReportXML源码): public ReportXml(string filename) { this.filename = filename; doc = new XmlDocument(); doc.Load(filename); root = doc.DocumentElement; xnm=new XmlNamespaceManager(doc.NameTable); xnm.AddNamespace("rd", "http://schemas.microsoft.com/SQLServer/reporting/reportdesigner"); xnm.AddNamespace("default", "http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"); xnm.PushScope(); xpathdoc = new XPathDocument(filename); xnv = xpathdoc.CreateNavigator(); } private XmlNode CreateNode( string nodename, string innertext) { XmlNode node = null; node = doc.CreateNode(XmlNodeType.Element, nodename, "http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"); node.InnerText = innertext; return node; } private XmlNode CreateNode(string nodename) { XmlNode node = null; node = doc.CreateNode(XmlNodeType.Element, nodename, "http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"); return node; } public void AddParamter(string name, string type, string prompt) { XmlNode node = null; XmlNode refCd = root.SelectSingleNode("//default:ReportParameters", xnm); XmlElement docFrag = doc.CreateElement("ReportParameter", "http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"); docFrag.SetAttribute("Name",name); node = doc.CreateNode(XmlNodeType.Element, "DataType", "http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"); node.InnerText = type; docFrag.AppendChild(node); node = doc.CreateNode(XmlNodeType.Element, "Nullable", "http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"); node.InnerText = "true"; docFrag.AppendChild(node); node = doc.CreateNode(XmlNodeType.Element, "Prompt", "http://schemas.microsoft.com/sqlserver/reporting/2005/01/reportdefinition"); node.InnerText = prompt; docFrag.AppendChild(node); refCd.InsertAfter(docFrag, refCd.LastChild); doc.Save(filename); }(未完) 实现的效果图(1): 实现的效果图(1):
