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  • DataAdapter使用示例、通用DataAdapter

            /// <summary>
            /// 通用DataAdapter,表要求有【主键】且查询为单表简单查询
            /// </summary>
            /// <param name="tableName">表名</param>
            public static OleDbDataAdapter SmartDataAdapter(string tableName)
            {
                OleDbDataAdapter adapter = new OleDbDataAdapter(string.Format("select * from {0}", tableName), connectionString);
                //为adapter构造默认的 InsertCommand,DeleteCommand,UpdateCommand 需要主键支持
                OleDbCommandBuilder cmdbuilder = new OleDbCommandBuilder(adapter);
                return adapter;
            }

         

            datatable删除的时候不能用DataTable.Rows.RemoveAt();

            要用DataTable.Rows[i].Delete();

            否则无法删除数据库数据(不会报错)

    ----------------------------示例---------------------

    protected static SqlDataAdapter adapterTBBMGL()
            {
                StringBuilder sqlInsert = new StringBuilder();
                sqlInsert.Append("insert into TBBMGL(");
                sqlInsert.Append("TBWBH,TBZDM,BZ)");
                sqlInsert.Append(" values (");
                sqlInsert.Append("@TBWBH,@TBZDM,@BZ)");

                StringBuilder sqlUpdate = new StringBuilder();
                sqlUpdate.Append("update TBBMGL set ");
                sqlUpdate.Append("TBZDM=@TBZDM,");
                sqlUpdate.Append("BZ   =@BZ"    );
                sqlUpdate.Append(" where TBWBH=@TBWBH ");

                SqlDataAdapter da = new SqlDataAdapter();

                //新增命令InsertCommand参数
                da.InsertCommand = new SqlCommand(sqlInsert.ToString(), sqlConnect);
       da.InsertCommand.Parameters.Add("@TBWBH", SqlDbType.TinyInt,1 ,"TBWBH");//最后一个参数为对应datatable列的列名
       da.InsertCommand.Parameters.Add("@TBZDM", SqlDbType.VarChar,50,"TBZDM");
       da.InsertCommand.Parameters.Add("@BZ"   , SqlDbType.VarChar,60,"BZ"   );

                //修改命令UpdateCommand参数
                da.UpdateCommand = new SqlCommand(sqlUpdate.ToString(), sqlConnect);

                //删除命令DeleteCommand参数
                da.DeleteCommand = new SqlCommand("delete TBBMGL where TBWBH=@TBWBH ", sqlConnect);
                da.DeleteCommand.Parameters.Add("@TBWBH", SqlDbType.TinyInt, 1,"TBWBH");

                return da;
            }

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  • 原文地址:https://www.cnblogs.com/djian/p/1848092.html
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