分享一个动态生成RDLC报表的类

在实际工作中，当需要进行大批量查询和生成报表的时候，可以使用我写的类。

特点：

• 无需报表设计器、无需为报表设置数据集
• 只需要传入查询结果就可以全自动生成报表，传入的对象为Dynamic（目前支持DataTable和IEnumable<T>的传入参数）
• 文字、数据表可以无限添加
• 支持图表 ( 2014-5-28 v0.4 增加参数类，完成图表显示功能）
• 支持数据分组（2014-5-19 v0.3 添加表格内分组）

我没有采用使用操纵微软报表Schema的方法，而是用了拼接字符串：（

将来想到的扩展功能有：

• 支持子报表

更新日志：

2014-5-15 更新，将匿名类转换成DataTable，然后去除0和0.00%等字段。

 * 2014-5-19 v0.3 添加表格内分组
 * 2014-5-28 v0.4 增加参数类，开始做图表显示功能

源码：

接口：

using System.Text;
using System.Xml;
using System.Xml.Linq;
using System.Xml.Serialization;
using Microsoft.Reporting.WebForms;

    public interface IDynamicReport
    {
        void SetReport(ReportViewer reportViewer);
        void AddData<T>(IEnumerable<T> data);
        void AddData(DataTable dataTable);
        void ShowReport();
        void LoadReport(string reportPath);
        void SetColoumStyle(List<ReportColoumStyle> coloumStyle);
        void AddText(string title);
    }

辅助类和枚举：

    public class ReportColoumStyle
    {
        public string ColoumName { get; set; }
        public float ColoumWidth { get; set; }
        public TextAlign TextAlign { get; set; }

        public ReportColoumStyle()
        {
            ColoumWidth = DynamicReport.ColoumWidth;
        }
    }

    public enum TextAlign
    {
        Left,
        Center,
        Right
    }

    public enum ReportType
    {
        Tables,
        Chart,
        Finally
    }

    internal enum DataType
    {
        DataTable,
        Enumerable
    }

    internal class ReportItemPattern
    {
        public string DataSetName { get; set; }
        public string DataSetString { get; set; }
        public string TablixString { get; set; }
        public dynamic Data { get; set; }

        public string DataSetPattern
        {
            get
            {
                return "    <DataSet Name=\"@DataSetNameData\">" +
                       "       <Fields>@Fields</Fields>" +
                       "       <Query>" +
                       "           <DataSourceName>DummyDataSource</DataSourceName>" +
                       "           <CommandText />" +
                       "       </Query>" +
                       "    </DataSet>";
            }
        }

        public string TablixPattern
        {
            get
            {
                return " <Tablix Name=\"Tablix@DataSetName\">" +
                       "   <TablixBody>" +
                       "       <TablixColumns>@TablixColumns</TablixColumns>" +
                       "       <TablixRows>" +
                       "           <TablixRow>" +
                       "               <Height>0.23622in</Height>" +
                       "               <TablixCells>@TablixHeader</TablixCells>" +
                       "           </TablixRow>" +
                       "           <TablixRow>" +
                       "               <Height>0.23622in</Height>" +
                       "               <TablixCells>@TablixCells</TablixCells>" +
                       "           </TablixRow>" +
                       "       </TablixRows>" +
                       "   </TablixBody>" +
                       "   <TablixColumnHierarchy>" +
                       "       <TablixMembers>@TablixMember</TablixMembers>" +
                       "   </TablixColumnHierarchy>" +
                       "   <TablixRowHierarchy>" +
                       "       <TablixMembers>" +
                       "           <TablixMember>" +
                       "               <KeepWithGroup>After</KeepWithGroup>" +
                       "           </TablixMember>" +
                       "           <TablixMember>" +
                       "               <Group Name=\"详细信息@DataSetName\" />" +
                       "           </TablixMember>" +
                       "       </TablixMembers>" +
                       "   </TablixRowHierarchy>" +
                       "   <DataSetName>@DataSetNameData</DataSetName>" +
                       "   <Top>@TopPositioncm</Top>" +
                       "   <Left>@LeftPostioncm</Left>" +
                       "   <Height>1.2cm</Height>" +
                       "   <Width>14.35207cm</Width>" +
                       "   <Style>" +
                       "       <Border>" +
                       "           <Style>None</Style>" +
                       "       </Border>" +
                       "   </Style>" +
                       "</Tablix>";
            }
        }
    }

    internal static class DynamicReportExtension
    {
        public static dynamic RemoveZeroData(this object data)
        {
            if (data is DataTable)
            {
                return ((DataTable)data).ChangeEachColumnTypeToString();
            }
            else if (data is IEnumerable)
            {
                var _data = ((IEnumerable) data).Cast<object>();
                return _data.CopyToDataTable().RemoveZeroData();
            }
            return data;
        }

        public static DataTable ChangeEachColumnTypeToString(this DataTable dt)
        {
            DataTable tempdt = new DataTable();
            foreach (DataColumn dc in dt.Columns)
            {
                DataColumn tempdc = new DataColumn();

                tempdc.ColumnName = dc.ColumnName;
                tempdc.DataType = typeof (String);
                tempdt.Columns.Add(tempdc);
            }
            int coloumCount = dt.Columns.Count;
            foreach (DataRow dr in dt.Rows)
            {
                var newrow = tempdt.NewRow();

                for (int i = 0; i < coloumCount; i ++)
                {
                    var value = dr[i].ToString();
                    switch (value)
                    {
                        case "0":
                        case "0.00%":
                            newrow[i] = "-";
                            break;
                        default:
                            newrow[i] = value;
                            break;
                    }
                    
                }
                tempdt.Rows.Add(newrow);
            }
            return tempdt;
        }
    }

    internal static class DataSetLinqOperators
    {
        public static DataTable CopyToDataTable<T>(this IEnumerable<T> source)
        {
            return new ObjectShredder<T>().Shred(source, null, null);
        }

        public static DataTable CopyToDataTable<T>(this IEnumerable<T> source,
                                                   DataTable table, LoadOption? options)
        {
            return new ObjectShredder<T>().Shred(source, table, options);
        }

    }

    internal class ObjectShredder<T>
    {
        private FieldInfo[] _fi;
        private PropertyInfo[] _pi;
        private Dictionary<string, int> _ordinalMap;
        private Type _type;

        public ObjectShredder()
        {
            _type = typeof (T);
            _fi = _type.GetFields();
            _pi = _type.GetProperties();
            _ordinalMap = new Dictionary<string, int>();
        }

        public DataTable Shred(IEnumerable<T> source, DataTable table, LoadOption ? options)
        {
            if (typeof (T).IsPrimitive)
            {
                return ShredPrimitive(source, table, options);
            }


            if (table == null)
            {
                table = new DataTable(typeof (T).Name);
            }

            // now see if need to extend datatable base on the type T + build ordinal map
            table = ExtendTable(table, typeof (T));

            table.BeginLoadData();
            using (IEnumerator<T> e = source.GetEnumerator())
            {
                while (e.MoveNext())
                {
                    if (options != null)
                    {
                        table.LoadDataRow(ShredObject(table, e.Current), (LoadOption) options);
                    }
                    else
                    {
                        table.LoadDataRow(ShredObject(table, e.Current), true);
                    }
                }
            }
            table.EndLoadData();
            return table;
        }

        public DataTable ShredPrimitive(IEnumerable<T> source, DataTable table, LoadOption ? options)
        {
            if (table == null)
            {
                table = new DataTable(typeof (T).Name);
            }

            if (!table.Columns.Contains("Value"))
            {
                table.Columns.Add("Value", typeof (T));
            }

            table.BeginLoadData();
            using (IEnumerator<T> e = source.GetEnumerator())
            {
                Object[] values = new object[table.Columns.Count];
                while (e.MoveNext())
                {
                    values[table.Columns["Value"].Ordinal] = e.Current;

                    if (options != null)
                    {
                        table.LoadDataRow(values, (LoadOption) options);
                    }
                    else
                    {
                        table.LoadDataRow(values, true);
                    }
                }
            }
            table.EndLoadData();
            return table;
        }

        public DataTable ExtendTable(DataTable table, Type type)
        {
            // value is type derived  T, may need to extend table.
            foreach (FieldInfo f in type.GetFields())
            {
                if (!_ordinalMap.ContainsKey(f.Name))
                {
                    DataColumn dc = table.Columns.Contains(f.Name) ?
                    table.Columns[f.Name]
                    :
                    table.Columns.Add(f.Name, f.FieldType);
                    _ordinalMap.Add(f.Name, dc.Ordinal);
                }
            }
            foreach (PropertyInfo p in type.GetProperties())
            {
                if (!_ordinalMap.ContainsKey(p.Name))
                {
                    DataColumn dc = table.Columns.Contains(p.Name) ?
                    table.Columns[p.Name]
                    :
                    table.Columns.Add(p.Name, p.PropertyType);
                    _ordinalMap.Add(p.Name, dc.Ordinal);
                }
            }
            return table;
        }

        public object[] ShredObject(DataTable table, T instance)
        {

            FieldInfo[] fi = _fi;
            PropertyInfo[] pi = _pi;

            if (instance.GetType() != typeof (T))
            {
                ExtendTable(table, instance.GetType());
                fi = instance.GetType().GetFields();
                pi = instance.GetType().GetProperties();
            }

            Object[] values = new object[table.Columns.Count];
            foreach (FieldInfo f in fi)
            {
                values[_ordinalMap[f.Name]] = f.GetValue(instance);
            }

            foreach (PropertyInfo p in pi)
            {
                values[_ordinalMap[p.Name]] = p.GetValue(instance, null);
            }
            return values;
        }
    }

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