设计器必须创建类型“System.Data.Common.DbDataAdapter”的实例，但该类型已声明为抽象，因此设计器无法创建该类型的实例
设计器必须创建类型“System.Data.Common.DbDataAdapter”的实例，但该类型已声明为抽象，因此设计器无法创建该类型的实例。
隐藏
在 System.ComponentModel.Design.Serialization.CodeDomSerializerBase.Error(IDesignerSerializationManager manager, String exceptionText, String helpLink)
在 System.ComponentModel.Design.Serialization.TypeCodeDomSerializer.Deserialize(IDesignerSerializationManager manager, CodeTypeDeclaration declaration)
在 System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager manager)
在 Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager)
在 System.ComponentModel.Design.Serialization.BasicDesignerLoader.BeginLoad(IDesignerLoaderHost host)
using System;using System.Collections.Generic;using System.Text;using System.Data;using System.Data.Common;namespace Components{ class DataReaderAdapter:DbDataAdapter { public int FillFromReader(DataTable dataTable, IDataReader dataReader) { return Fill(dataTable, dataReader); } protected override RowUpdatedEventArgs CreateRowUpdatedEvent(DataRow dataRow, IDbCommand command, StatementType statementType, DataTableMapping tableMapping) { return null; } protected override RowUpdatingEventArgs CreateRowUpdatingEvent(DataRow dataRow, IDbCommand command, StatementType statementType, DataTableMapping tableMapping) { return null; } protected override void OnRowUpdated(RowUpdatedEventArgs value) { } protected override void OnRowUpdating(RowUpdatingEventArgs value) { } }}#region 将DataReader 转为 DataTable /// <summary> /// 将DataReader 转为 DataTable /// </summary> /// <param name="DataReader">DataReader</param> public static DataTable ConvertDataReaderToDataTable(SqlDataReader dataReader) { DataTable datatable = new DataTable(); try { DataTable schemaTable = dataReader.GetSchemaTable(); //int bun=schemaTable.Rows.Count; //DataColumn myDataColumn = new DataColumn(); //for(int bui=0;bui<bun;bui++) //{ //myDataColumn.DataType = schemaTable.Rows[0].GetType(); //myRow.GetType(); //myDataColumn.ColumnName = schemaTable.Rows[0].ToString(); //} //datatable.Columns.Add(myDataColumn); if (schemaTable != null) { foreach (DataRow myRow in schemaTable.Rows) { DataColumn myDataColumn = new DataColumn(); myDataColumn.DataType = myRow.GetType(); myDataColumn.ColumnName = myRow[0].ToString(); datatable.Columns.Add(myDataColumn); } } DataReader dra = new DataReader(); dra.FillFromReader(datatable, dataReader); dra = null; dataReader.Close(); } catch (Exception ex) { Error.Log(ex.ToString()); throw new Exception("转换出错!", ex); } return datatable; } #endregion