Rdlc报表 数据汇总分组展示

• 1.从工具箱拉出表或者矩阵（本次使用的是矩阵）

• 2.选择需要的数据集，没有就新建一个数据集，名称自己起好，下面有用到

• 3.将行组和行列显示出来（右击报表--试图=>）

• 4.双击行组下的RowGroup组=>常规=>组表达式=>分组方式，点击FX 选择类别=>字段（DbSetName）=>双击右边的值（选择你要的分组依据），或者直接点击页面矩阵上行右上角的图标添加分组依据（第3步图）。
• 5.右击行组--RowGroup组，添加组=>子组,同第3步一样 fx 之后的步骤

6.如果在这个组下有其他数据要展示，右击你添加好的行组所在视图的文本框=>插入列=>组内部-右侧（位置左右自己挑）

                              7.后台代码

var list=XXX，在数据层拿到T-SQL数据

直接输出为PDF下载到本地

excel格式： 

  var bytes = viewer.LocalReport.Render("Pdf")中把 “PDF”替换”EXCEL“;

      Response.ContentEncoding = Encoding.GetEncoding("GB2312"); 把 “GB2312”替换"application/vnd.ms-excel";
              

   protected void Page_Load(object sender, EventArgs e)
         {

             if (IsPostBack) return;
            try
             {
              var list = new reportBL().report();
                 if (list.Count == )
                 {
                     Response.Write("没有信息!");
                     return;
                 }
                DataTable dt = ListToDataTable(list);
                 var viewer = new ReportViewer();
                 viewer.LocalReport.ReportPath = @"Rpt\Rdlc\SampleForm.rdlc";
                 viewer.ProcessingMode = ProcessingMode.Local;
                //这里把建好的数据集的名称替换掉DataSetName
                 var rds = new ReportDataSource("DataSetName", dt);
                 viewer.LocalReport.EnableExternalImages = true;
                 viewer.LocalReport.DataSources.Clear();
                 viewer.LocalReport.DataSources.Add(rds);
                 viewer.LocalReport.EnableExternalImages = true;
                 errCode = ;
                 viewer.LocalReport.Refresh();
                 var bytes = viewer.LocalReport.Render("Pdf");
                 errCode = ;
                 Response.ContentType = "application/pdf";
                 //设定编码方式，若输出的excel有乱码，可优先从编码方面解决
                 Response.Charset = "gb2312";
                 //Response.Charset = "utf-8";
                 Response.ContentEncoding = Encoding.GetEncoding("GB2312");
                 //关闭ViewState，此属性在Page中
                 EnableViewState = false;
                 //filenames是自定义的文件名
                 Response.AppendHeader("Content-Disposition", string.Format("attachment;filename={0}.pdf", DateTime.Now.ToString("yyyyMMddHHmmssffff")));
                 //content是步骤1的html，注意是string类型
                 Response.BinaryWrite(bytes);
                 Response.End();

             }
             catch (Exception ex)
             {

                 Response.Write(ex.Message + ":" + errCode);
             }

         }
         public static DataTable ListToDataTable<T>(IList<T> list, params string[] propertyName)
         {
             var propertyNameList = new List<string>();
             if (propertyName != null)
                 propertyNameList.AddRange(propertyName);
             var result = new DataTable();
             if (list.Count > )
             {
                 PropertyInfo[] propertys = list[].GetType().GetProperties();
                 foreach (PropertyInfo pi in propertys)
                 {
                     if (propertyNameList.Count == )
                     {
                         DataColumn dc = new DataColumn();
                         dc.AllowDBNull = true;
                         dc.ColumnName = pi.Name;
                         dc.DataType = pi.PropertyType;
                         result.Columns.Add(dc);
                     }
                     else
                     {
                         if (propertyNameList.Contains(pi.Name))
                             result.Columns.Add(pi.Name, pi.PropertyType);
                     }
                 }

                 for (var i = ; i < list.Count; i++)
                 {
                     var tempList = new ArrayList();
                     foreach (PropertyInfo pi in propertys)
                     {
                         if (propertyNameList.Count == )
                         {
                             object obj = pi.GetValue(list[i], null);
                             tempList.Add(obj);
                         }
                         else
                         {
                             if (propertyNameList.Contains(pi.Name))
                             {
                                 var obj = pi.GetValue(list[i], null);
                                 tempList.Add(obj);
                             }
                         }
                     }
                     object[] array = tempList.ToArray();
                     result.LoadDataRow(array, true);
                 }
             }
             return result;
         }