捕捉到 System.Data.SqlClient.SqlException Message=对象名 '' 无效

lishan200012 2015-06-26 03:52:21
建立的Connecting的链接,数据是指向A。
我现在通过A的数据库链接要向B数据库中写入数据(A和B是在同一台服务器上。)
代码如下

MasterCmd = new SqlCommand("select * from B..p_material where tParentId=101", db.thisSqlconnection);
MasterAdapter = new SqlDataAdapter();
MasterAdapter.SelectCommand = MasterCmd;
MasterDt = new DataTable();
MasterAdapter.Fill(MasterDt);
上面代码是打开B数据库中p_material,是可以读取数据的

DR = MasterDt.NewRow();
......
MasterDt.Rows.Add(DR);
MasterAdapter.Update(MasterDt);
上面的代码在向B数据库中p_material插入数据时报错提示:


捕捉到 System.Data.SqlClient.SqlException Message=对象名 'p_material' 无效。
Source=.Net SqlClient Data Provider
ErrorCode=-2146232060 Class=16 LineNumber=1 Number=208
Procedure=""
Server=10.97.138.145
State=1
StackTrace:
在 System.Data.Common.DbDataAdapter.UpdatedRowStatusErrors(RowUpdatedEventArgs rowUpdatedEvent, BatchCommandInfo[] batchCommands, Int32 commandCount)
在 System.Data.Common.DbDataAdapter.UpdatedRowStatus(RowUpdatedEventArgs rowUpdatedEvent, BatchCommandInfo[] batchCommands, Int32 commandCount)
在 System.Data.Common.DbDataAdapter.Update(DataRow[] dataRows, DataTableMapping tableMapping)
在 System.Data.Common.DbDataAdapter.UpdateFromDataTable(DataTable dataTable, DataTableMapping tableMapping)
在 System.Data.Common.DbDataAdapter.Update(DataTable dataTable)
在 HCSZ_EMC.Film_Frm_P_Material.AddNew() 位置 C:\Users\00100146\Desktop\HCSZ_EMC\HCSZ_EMC\HCSZ_EMC\Film_Frm_P_Material.cs:行号 265
在 HCSZ_EMC.Film_Frm_P_Material.tbtSave_Click(Object sender, EventArgs e) 位置 C:\Users\00100146\Desktop\HCSZ_EMC\HCSZ_EMC\HCSZ_EMC\Film_Frm_P_Material.cs:行号 298
InnerException:

求教大神们如何解决。
(要是能新建B数据库的链接,就不存在此问题了。)
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lishan200012 2015-06-27
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引用 6 楼 duanzi_peng 的回复:
[quote=引用 5 楼 lishan200012 的回复:] [quote=引用 4 楼 duanzi_peng 的回复:] B..p_material -》 这中间是2个点号么???? 先把Sql语句在sql编译器中执行一边,看看有没有语法错误。
语法上没有问题的。[/quote] 必须重建 B数据库的链接。不同的链接 创建不同的cmd对象,对不同的数据库进行操作。 你虽然创建了 A数据库的链接,但是 cmd执行的sql语句是不知道有B这个数据库的。[/quote] 这个应该不是跟数据库的链接有关。 应该是SQLDataAdapter有关。
exception92 2015-06-26
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引用 5 楼 lishan200012 的回复:
[quote=引用 4 楼 duanzi_peng 的回复:] B..p_material -》 这中间是2个点号么???? 先把Sql语句在sql编译器中执行一边,看看有没有语法错误。
语法上没有问题的。[/quote] 必须重建 B数据库的链接。不同的链接 创建不同的cmd对象,对不同的数据库进行操作。 你虽然创建了 A数据库的链接,但是 cmd执行的sql语句是不知道有B这个数据库的。
lishan200012 2015-06-26
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引用 4 楼 duanzi_peng 的回复:
B..p_material -》 这中间是2个点号么???? 先把Sql语句在sql编译器中执行一边,看看有没有语法错误。
语法上没有问题的。
exception92 2015-06-26
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B..p_material -》 这中间是2个点号么???? 先把Sql语句在sql编译器中执行一边,看看有没有语法错误。
jijkc 2015-06-26
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引用 2 楼 lishan200012 的回复:
用update B..p_material 。。。是可以的。 MasterAdapter.Fill(MasterDt)能读取出数据,为什么MasterAdapter.Update(MasterDt)不行。
估计是在A连接中执行了SQL语句,update p_material 。。。,但A数据库中没有表p_material,所以报错了,你可以用用 SQL Server Profiler 追踪这个结果看看。MasterAdapter.Update(MasterDt)这个原理那些就不看了,好久没用ado.net了 http://www.cnblogs.com/snowdream/archive/2009/02/10/use-sql-server-profiler-trace-exception.html
lishan200012 2015-06-26
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用update B..p_material 。。。是可以的。 MasterAdapter.Fill(MasterDt)能读取出数据,为什么MasterAdapter.Update(MasterDt)不行。
jijkc 2015-06-26
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对象名 'p_material' 无效,估计是在A连接中执行了更新找不到这张表; 建议用Execute NonQuery,再写 new SqlCommand("update B..p_material .." 试试,不要用MasterAdapter.Update(MasterDt);
一款特别好用的.net数据库链接通用类。 using System; using System.Collections; using System.Collections.Specialized; using System.Data; using System.Data.SqlClient; using System.Configuration; using System.Data.Common; using System.Collections.Generic; namespace CMS.DBUtility { /// /// 数据访问抽象基础类 /// Copyright (C) 2004-2008 By LiTianPing /// public abstract class DbHelperSQL { //数据库连接字符串(web.config来配置),可以动态更改connectionString支持多数据库. public static string connectionString = PubConstant.ConnectionString; public DbHelperSQL() { } #region 公用方法 /// /// 判断是否存在某表的某个字段 /// /// 称 /// 称 /// 是否存在 public static bool ColumnExists(string tableName, string columnName) { string sql = "select count(1) from syscolumns where [id]=object_id('" + tableName + "') and [name]='" + columnName + "'"; object res = GetSingle(sql); if (res == null) { return false; } return Convert.ToInt32(res) > 0; } public static int GetMaxID(string FieldName, string TableName) { string strsql = "select max(" + FieldName + ")+1 from " + TableName; object obj = GetSingle(strsql); if (obj == null) { return 1; } else { return int.Parse(obj.ToString()); } } public static bool Exists(string strSql) { object obj = GetSingle(strSql); int cmdresult; if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value))) { cmdresult = 0; } else { cmdresult = int.Parse(obj.ToString()); } if (cmdresult == 0) { return false; } else { return true; } } /// /// 表是否存在 /// /// /// public static bool TabExists(string TableName) { string strsql = "select count(*) from sysobjects where id = object_id(N'[" + TableName + "]') and OBJECTPROPERTY(id, N'IsUserTable') = 1"; //string strsql = "SELECT count(*) FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[" + TableName + "]') AND type in (N'U')"; object obj = GetSingle(strsql); int cmdresult; if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value))) { cmdresult = 0; } else { cmdresult = int.Parse(obj.ToString()); } if (cmdresult == 0) { return false; } else { return true; } } public static bool Exists(string strSql, params SqlParameter[] cmdParms) { object obj = GetSingle(strSql, cmdParms); int cmdresult; if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value))) { cmdresult = 0; } else { cmdresult = int.Parse(obj.ToString()); } if (cmdresult == 0) { return false; } else { return true; } } #endregion #region 执行简单SQL语句 /// /// 执行SQL语句,返回影响的记录数 /// /// SQL语句 /// 影响的记录数 public static int ExecuteSql(string SQLString) { using (SqlConnection connection = new SqlConnection(connectionString)) { using (SqlCommand cmd = new SqlCommand(SQLString, connection)) { try { connection.Open(); int rows = cmd.ExecuteNonQuery(); return rows; } catch (System.Data.SqlClient.SqlException e) { connection.Close(); throw e; } } } } public static int ExecuteSqlByTime(string SQLString, int Times) { using (SqlConnection connection = new SqlConnection(connectionString)) { using (SqlCommand cmd = new SqlCommand(SQLString, connection)) { try { connection.Open(); cmd.CommandTimeout = Times; int rows = cmd.ExecuteNonQuery(); return rows; } catch (System.Data.SqlClient.SqlException e) { connection.Close(); throw e; } } } } /// /// 执行Sql和Oracle滴混合事务 /// /// SQL命令行列表 /// Oracle命令行列表 /// 执行结果 0-由于SQL造成事务失败 -1 由于Oracle造成事务失败 1-整体事务执行成功 public static int ExecuteSqlTran(List list, List oracleCmdSqlList) { using (SqlConnection conn = new SqlConnection(connectionString)) { conn.Open(); SqlCommand cmd = new SqlCommand(); cmd.Connection = conn; SqlTransaction tx = conn.BeginTransaction(); cmd.Transaction = tx; try { foreach (CommandInfo myDE in list) { string cmdText = myDE.CommandText; SqlParameter[] cmdParms = (SqlParameter[])myDE.Parameters; PrepareCommand(cmd, conn, tx, cmdText, cmdParms); if (myDE.EffentNextType == EffentNextType.SolicitationEvent) { if (myDE.CommandText.ToLower().IndexOf("count(") == -1) { tx.Rollback(); throw new Exception("违背要求"+myDE.CommandText+"必须符合select count(..的格式"); //return 0; } object obj = cmd.ExecuteScalar(); bool isHave = false; if (obj == null && obj == DBNull.Value) { isHave = false; } isHave = Convert.ToInt32(obj) > 0; if (isHave) { //引发事件 myDE.OnSolicitationEvent(); } } if (myDE.EffentNextType == EffentNextType.WhenHaveContine || myDE.EffentNextType == EffentNextType.WhenNoHaveContine) { if (myDE.CommandText.ToLower().IndexOf("count(") == -1) { tx.Rollback(); throw new Exception("SQL:违背要求" + myDE.CommandText + "必须符合select count(..的格式"); //return 0; } object obj = cmd.ExecuteScalar(); bool isHave = false; if (obj == null && obj == DBNull.Value) { isHave = false; } isHave = Convert.ToInt32(obj) > 0; if (myDE.EffentNextType == EffentNextType.WhenHaveContine && !isHave) { tx.Rollback(); throw new Exception("SQL:违背要求" + myDE.CommandText + "返回值必须大于0"); //return 0; } if (myDE.EffentNextType == EffentNextType.WhenNoHaveContine && isHave) { tx.Rollback(); throw new Exception("SQL:违背要求" + myDE.CommandText + "返回值必须等于0"); //return 0; } continue; } int val = cmd.ExecuteNonQuery(); if (myDE.EffentNextType == EffentNextType.ExcuteEffectRows && val == 0) { tx.Rollback(); throw new Exception("SQL:违背要求" + myDE.CommandText + "必须有影响行"); //return 0; } cmd.Parameters.Clear(); } string oraConnectionString = PubConstant.GetConnectionString("ConnectionStringPPC"); bool res = OracleHelper.ExecuteSqlTran(oraConnectionString, oracleCmdSqlList); if (!res) { tx.Rollback(); throw new Exception("Oracle执行失败"); // return -1; } tx.Commit(); return 1; } catch (System.Data.SqlClient.SqlException e) { tx.Rollback(); throw e; } catch (Exception e) { tx.Rollback(); throw e; } } } /// /// 执行多条SQL语句,实现数据库事务。 /// /// 多条SQL语句 public static int ExecuteSqlTran(List SQLStringList) { using (SqlConnection conn = new SqlConnection(connectionString)) { conn.Open(); SqlCommand cmd = new SqlCommand(); cmd.Connection = conn; SqlTransaction tx = conn.BeginTransaction(); cmd.Transaction = tx; try { int count = 0; for (int n = 0; n < SQLStringList.Count; n++) { string strsql = SQLStringList[n]; if (strsql.Trim().Length > 1) { cmd.CommandText = strsql; count += cmd.ExecuteNonQuery(); } } tx.Commit(); return count; } catch { tx.Rollback(); return 0; } } } /// /// 执行带一个存储过程参数的的SQL语句。 /// /// SQL语句 /// 参数内容,比如一个字段是格式复杂的文章,有特殊符号,可以通过这个方式添加 /// 影响的记录数 public static int ExecuteSql(string SQLString, string content) { using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand cmd = new SqlCommand(SQLString, connection); System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText); myParameter.Value = content; cmd.Parameters.Add(myParameter); try { connection.Open(); int rows = cmd.ExecuteNonQuery(); return rows; } catch (System.Data.SqlClient.SqlException e) { throw e; } finally { cmd.Dispose(); connection.Close(); } } } /// /// 执行带一个存储过程参数的的SQL语句。 /// /// SQL语句 /// 参数内容,比如一个字段是格式复杂的文章,有特殊符号,可以通过这个方式添加 /// 影响的记录数 public static object ExecuteSqlGet(string SQLString, string content) { using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand cmd = new SqlCommand(SQLString, connection); System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText); myParameter.Value = content; cmd.Parameters.Add(myParameter); try { connection.Open(); object obj = cmd.ExecuteScalar(); if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value))) { return null; } else { return obj; } } catch (System.Data.SqlClient.SqlException e) { throw e; } finally { cmd.Dispose(); connection.Close(); } } } /// /// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例) /// /// SQL语句 /// 图像字节,数据库的字段类型为image的情况 /// 影响的记录数 public static int ExecuteSqlInsertImg(string strSQL, byte[] fs) { using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand cmd = new SqlCommand(strSQL, connection); System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@fs", SqlDbType.Image); myParameter.Value = fs; cmd.Parameters.Add(myParameter); try { connection.Open(); int rows = cmd.ExecuteNonQuery(); return rows; } catch (System.Data.SqlClient.SqlException e) { throw e; } finally { cmd.Dispose(); connection.Close(); } } } /// /// 执行一条计算查询结果语句,返回查询结果(object)。 /// /// 计算查询结果语句 /// 查询结果(object) public static object GetSingle(string SQLString) { using (SqlConnection connection = new SqlConnection(connectionString)) { using (SqlCommand cmd = new SqlCommand(SQLString, connection)) { try { connection.Open(); object obj = cmd.ExecuteScalar(); if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value))) { return null; } else { return obj; } } catch (System.Data.SqlClient.SqlException e) { connection.Close(); throw e; } } } } public static object GetSingle(string SQLString, int Times) { using (SqlConnection connection = new SqlConnection(connectionString)) { using (SqlCommand cmd = new SqlCommand(SQLString, connection)) { try { connection.Open(); cmd.CommandTimeout = Times; object obj = cmd.ExecuteScalar(); if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value))) { return null; } else { return obj; } } catch (System.Data.SqlClient.SqlException e) { connection.Close(); throw e; } } } } /// /// 执行查询语句,返回SqlDataReader ( 注意:调用该方法后,一定要对SqlDataReader进行Close ) /// /// 查询语句 /// SqlDataReader public static SqlDataReader ExecuteReader(string strSQL) { SqlConnection connection = new SqlConnection(connectionString); SqlCommand cmd = new SqlCommand(strSQL, connection); try { connection.Open(); SqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection); return myReader; } catch (System.Data.SqlClient.SqlException e) { throw e; } } /// /// 执行查询语句,返回DataSet /// /// 查询语句 /// DataSet public static DataSet Query(string SQLString) { using (SqlConnection connection = new SqlConnection(connectionString)) { DataSet ds = new DataSet(); try { connection.Open(); SqlDataAdapter command = new SqlDataAdapter(SQLString, connection); command.Fill(ds, "ds"); } catch (System.Data.SqlClient.SqlException ex) { throw new Exception(ex.Message); } return ds; } } public static DataSet Query(string SQLString, int Times) { using (SqlConnection connection = new SqlConnection(connectionString)) { DataSet ds = new DataSet(); try { connection.Open(); SqlDataAdapter command = new SqlDataAdapter(SQLString, connection); command.SelectCommand.CommandTimeout = Times; command.Fill(ds, "ds"); } catch (System.Data.SqlClient.SqlException ex) { throw new Exception(ex.Message); } return ds; } } #endregion #region 执行带参数的SQL语句 /// /// 执行SQL语句,返回影响的记录数 /// /// SQL语句 /// 影响的记录数 public static int ExecuteSql(string SQLString, params SqlParameter[] cmdParms) { using (SqlConnection connection = new SqlConnection(connectionString)) { using (SqlCommand cmd = new SqlCommand()) { try { PrepareCommand(cmd, connection, null, SQLString, cmdParms); int rows = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); return rows; } catch (System.Data.SqlClient.SqlException e) { throw e; } } } } /// /// 执行多条SQL语句,实现数据库事务。 /// /// SQL语句的哈希表(key为sql语句,value是该语句的SqlParameter[]) public static void ExecuteSqlTran(Hashtable SQLStringList) { using (SqlConnection conn = new SqlConnection(connectionString)) { conn.Open(); using (SqlTransaction trans = conn.BeginTransaction()) { SqlCommand cmd = new SqlCommand(); try { //循环 foreach (DictionaryEntry myDE in SQLStringList) { string cmdText = myDE.Key.ToString(); SqlParameter[] cmdParms = (SqlParameter[])myDE.Value; PrepareCommand(cmd, conn, trans, cmdText, cmdParms); int val = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); } trans.Commit(); } catch { trans.Rollback(); throw; } } } } /// /// 执行多条SQL语句,实现数据库事务。 /// /// SQL语句的哈希表(key为sql语句,value是该语句的SqlParameter[]) public static int ExecuteSqlTran(System.Collections.Generic.List cmdList) { using (SqlConnection conn = new SqlConnection(connectionString)) { conn.Open(); using (SqlTransaction trans = conn.BeginTransaction()) { SqlCommand cmd = new SqlCommand(); try { int count = 0; //循环 foreach (CommandInfo myDE in cmdList) { string cmdText = myDE.CommandText; SqlParameter[] cmdParms = (SqlParameter[])myDE.Parameters; PrepareCommand(cmd, conn, trans, cmdText, cmdParms); if (myDE.EffentNextType == EffentNextType.WhenHaveContine || myDE.EffentNextType == EffentNextType.WhenNoHaveContine) { if (myDE.CommandText.ToLower().IndexOf("count(") == -1) { trans.Rollback(); return 0; } object obj = cmd.ExecuteScalar(); bool isHave = false; if (obj == null && obj == DBNull.Value) { isHave = false; } isHave = Convert.ToInt32(obj) > 0; if (myDE.EffentNextType == EffentNextType.WhenHaveContine && !isHave) { trans.Rollback(); return 0; } if (myDE.EffentNextType == EffentNextType.WhenNoHaveContine && isHave) { trans.Rollback(); return 0; } continue; } int val = cmd.ExecuteNonQuery(); count += val; if (myDE.EffentNextType == EffentNextType.ExcuteEffectRows && val == 0) { trans.Rollback(); return 0; } cmd.Parameters.Clear(); } trans.Commit(); return count; } catch { trans.Rollback(); throw; } } } } /// /// 执行多条SQL语句,实现数据库事务。 /// /// SQL语句的哈希表(key为sql语句,value是该语句的SqlParameter[]) public static void ExecuteSqlTranWithIndentity(System.Collections.Generic.List SQLStringList) { using (SqlConnection conn = new SqlConnection(connectionString)) { conn.Open(); using (SqlTransaction trans = conn.BeginTransaction()) { SqlCommand cmd = new SqlCommand(); try { int indentity = 0; //循环 foreach (CommandInfo myDE in SQLStringList) { string cmdText = myDE.CommandText; SqlParameter[] cmdParms = (SqlParameter[])myDE.Parameters; foreach (SqlParameter q in cmdParms) { if (q.Direction == ParameterDirection.InputOutput) { q.Value = indentity; } } PrepareCommand(cmd, conn, trans, cmdText, cmdParms); int val = cmd.ExecuteNonQuery(); foreach (SqlParameter q in cmdParms) { if (q.Direction == ParameterDirection.Output) { indentity = Convert.ToInt32(q.Value); } } cmd.Parameters.Clear(); } trans.Commit(); } catch { trans.Rollback(); throw; } } } } /// /// 执行多条SQL语句,实现数据库事务。 /// /// SQL语句的哈希表(key为sql语句,value是该语句的SqlParameter[]) public static void ExecuteSqlTranWithIndentity(Hashtable SQLStringList) { using (SqlConnection conn = new SqlConnection(connectionString)) { conn.Open(); using (SqlTransaction trans = conn.BeginTransaction()) { SqlCommand cmd = new SqlCommand(); try { int indentity = 0; //循环 foreach (DictionaryEntry myDE in SQLStringList) { string cmdText = myDE.Key.ToString(); SqlParameter[] cmdParms = (SqlParameter[])myDE.Value; foreach (SqlParameter q in cmdParms) { if (q.Direction == ParameterDirection.InputOutput) { q.Value = indentity; } } PrepareCommand(cmd, conn, trans, cmdText, cmdParms); int val = cmd.ExecuteNonQuery(); foreach (SqlParameter q in cmdParms) { if (q.Direction == ParameterDirection.Output) { indentity = Convert.ToInt32(q.Value); } } cmd.Parameters.Clear(); } trans.Commit(); } catch { trans.Rollback(); throw; } } } } /// /// 执行一条计算查询结果语句,返回查询结果(object)。 /// /// 计算查询结果语句 /// 查询结果(object) public static object GetSingle(string SQLString, params SqlParameter[] cmdParms) { using (SqlConnection connection = new SqlConnection(connectionString)) { using (SqlCommand cmd = new SqlCommand()) { try { PrepareCommand(cmd, connection, null, SQLString, cmdParms); object obj = cmd.ExecuteScalar(); cmd.Parameters.Clear(); if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value))) { return null; } else { return obj; } } catch (System.Data.SqlClient.SqlException e) { throw e; } } } } /// /// 执行查询语句,返回SqlDataReader ( 注意:调用该方法后,一定要对SqlDataReader进行Close ) /// /// 查询语句 /// SqlDataReader public static SqlDataReader ExecuteReader(string SQLString, params SqlParameter[] cmdParms) { SqlConnection connection = new SqlConnection(connectionString); SqlCommand cmd = new SqlCommand(); try { PrepareCommand(cmd, connection, null, SQLString, cmdParms); SqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection); cmd.Parameters.Clear(); return myReader; } catch (System.Data.SqlClient.SqlException e) { throw e; } // finally // { // cmd.Dispose(); // connection.Close(); // } } /// /// 执行查询语句,返回DataSet /// /// 查询语句 /// DataSet public static DataSet Query(string SQLString, params SqlParameter[] cmdParms) { using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, connection, null, SQLString, cmdParms); using (SqlDataAdapter da = new SqlDataAdapter(cmd)) { DataSet ds = new DataSet(); try { da.Fill(ds, "ds"); cmd.Parameters.Clear(); } catch (System.Data.SqlClient.SqlException ex) { throw new Exception(ex.Message); } return ds; } } } private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, string cmdText, SqlParameter[] cmdParms) { if (conn.State != ConnectionState.Open) conn.Open(); cmd.Connection = conn; cmd.CommandText = cmdText; if (trans != null) cmd.Transaction = trans; cmd.CommandType = CommandType.Text;//cmdType; if (cmdParms != null) { foreach (SqlParameter parameter in cmdParms) { if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) && (parameter.Value == null)) { parameter.Value = DBNull.Value; } cmd.Parameters.Add(parameter); } } } #endregion #region 存储过程操作 /// /// 执行存储过程,返回SqlDataReader ( 注意:调用该方法后,一定要对SqlDataReader进行Close ) /// /// 存储过程 /// 存储过程参数 /// SqlDataReader public static SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters) { SqlConnection connection = new SqlConnection(connectionString); SqlDataReader returnReader; connection.Open(); SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters); command.CommandType = CommandType.StoredProcedure; returnReader = command.ExecuteReader(CommandBehavior.CloseConnection); return returnReader; } /// /// 执行存储过程 /// /// 存储过程 /// 存储过程参数 /// DataSet结果中的表 /// DataSet public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName) { using (SqlConnection connection = new SqlConnection(connectionString)) { DataSet dataSet = new DataSet(); connection.Open(); SqlDataAdapter sqlDA = new SqlDataAdapter(); sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters); sqlDA.Fill(dataSet, tableName); connection.Close(); return dataSet; } } public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName, int Times) { using (SqlConnection connection = new SqlConnection(connectionString)) { DataSet dataSet = new DataSet(); connection.Open(); SqlDataAdapter sqlDA = new SqlDataAdapter(); sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters); sqlDA.SelectCommand.CommandTimeout = Times; sqlDA.Fill(dataSet, tableName); connection.Close(); return dataSet; } } /// /// 构建 SqlCommand 对象(用来返回一个结果集,而不是一个整数值) /// /// 数据库连接 /// 存储过程 /// 存储过程参数 /// SqlCommand private static SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters) { SqlCommand command = new SqlCommand(storedProcName, connection); command.CommandType = CommandType.StoredProcedure; foreach (SqlParameter parameter in parameters) { if (parameter != null) { // 检查未分配值的输出参数,将其分配以DBNull.Value. if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) && (parameter.Value == null)) { parameter.Value = DBNull.Value; } command.Parameters.Add(parameter); } } return command; } /// /// 执行存储过程,返回影响的行数 /// /// 存储过程 /// 存储过程参数 /// 影响的行数 /// public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected) { using (SqlConnection connection = new SqlConnection(connectionString)) { int result; connection.Open(); SqlCommand command = BuildIntCommand(connection, storedProcName, parameters); rowsAffected = command.ExecuteNonQuery(); result = (int)command.Parameters["ReturnValue"].Value; //Connection.Close(); return result; } } /// /// 创建 SqlCommand 对象实例(用来返回一个整数值) /// /// 存储过程 /// 存储过程参数 /// SqlCommand 对象实例 private static SqlCommand BuildIntCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters) { SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters); command.Parameters.Add(new SqlParameter("ReturnValue", SqlDbType.Int, 4, ParameterDirection.ReturnValue, false, 0, 0, string.Empty, DataRowVersion.Default, null)); return command; } #endregion } }
private SqlConnection con; //数据库连接、关闭、释放资源 #region 数据库连接、关闭、释放资源 private void Open() { if (con == null) { //根据Web.Config文件中数据库连接串,建立数据连接 con = new SqlConnection(ConfigurationManager.ConnectionStrings["ApplicationServices"].ToString ()); } try { //判断连接对象状态,如果是关闭,将其打开 if (con.State == System.Data.ConnectionState.Closed) con.Open(); } catch (System.Data.SqlClient.SqlException E) { //如果出现错误,关闭数据连接,并抛出错误信息 this.Close(); throw new Exception(E.Message); } } public void Close() { if (con != null) { con.Close();//关闭连接 } } public void Dispose() { if (con != null) { con.Dispose();//释放连接资源 con = null; } } #endregion #region 参数处理 public SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value) //参数处理 { SqlParameter param; if (Size > 0) { param = new SqlParameter(ParamName, DbType, Size); } else { param = new SqlParameter(ParamName, DbType); } param.Direction = ParameterDirection.Input; if (Value != null) { param.Value = Value; } return param; } #endregion #region 将参数添加到SqlCommand当中 private SqlCommand CreateCommand(string procName, SqlParameter[] prams) //将参数添加到SqlCommand当中 { this.Open();//确认打开连接 SqlCommand cmd = new SqlCommand(procName, con); cmd.CommandType = CommandType.Text; //执行类型是命令文本。上面的参数procName即为SQL语句 //cmd.CommandType = CommandType.StoredProcedure; //执行类型是存储过程。上面的参数procName即为存储过程称 //下面依次把参数传入命令文本 if (prams != null) { foreach (SqlParameter parameter in prams) cmd.Parameters.Add(parameter); } return cmd; } #endregion #region 将参数添加到SqlDataAdapter当中 private SqlDataAdapter CreateDataAdapter(string procName, SqlParameter[] prams) //将参数添加到SqlDataAdapter当中 { this.Open(); SqlDataAdapter dap = new SqlDataAdapter(procName, con); dap.SelectCommand.CommandType = CommandType.Text;//执行类型:命令文本 //dap.SelectCommand.CommandType = CommandType.StoredProcedure;//执行类型:存储过程 if (prams != null) { foreach (SqlParameter parameter in prams) { dap.SelectCommand.Parameters.Add(parameter); } } return dap; } #endregion #region 针对查询(带参) public DataSet RunProcReturn(string procName, SqlParameter[] prams, string tbName) //针对查询(带参) { SqlDataAdapter dap = CreateDataAdapter(procName, prams); DataSet ds = new DataSet(); dap.Fill(ds, tbName); this.Close(); //得到执行成功返回值 return ds; } #endregion #region 针对查询(不带参) public DataSet RunProcReturn(string procName, string tbName) //针对查询(不带参) { SqlDataAdapter dap = CreateDataAdapter(procName, null); DataSet ds = new DataSet(); dap.Fill(ds, tbName); this.Close(); //得到执行成功返回值 return ds; } #endregion #region 针对增删改 public int RunProc(string procName, SqlParameter[] prams) //针对增删改 { SqlCommand cmd = CreateCommand(procName, prams); int i = cmd.ExecuteNonQuery(); this.Close(); return i; } #endregion }

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