/// <summary>
/// 获取表的约束条件
/// constraint_name - 约束名称
/// column_name - 约束的字段
/// constraint_type - 约束类型，P: 主键，U: 唯一键，R: 外键
/// </summary>
/// <param name="tableName"></param>
/// <returns></returns>
public ConstraintCollection GetTableConstraint(string tableName)
{
tableName = tableName.ToUpper();
string sql = "select col.constraint_name, col.column_name, c.constraint_type from user_cons_columns col, user_constraints c where col.constraint_name = c.constraint_name and c.constraint_type in ('P', 'U') and col.table_name = :table_name order by c.constraint_type, col.constraint_name, col.position";
try
{
DbParameter[] prams =
{
DbFactory <OracleConn, OracleFactory <OracleConn> > .MakeInParam(":table_name", OracleType.VarChar, 30, tableName),
};
IDbOperation db = new OracleExecute();
DataSet ds = db.FillDataset(sql, prams);
DataSet dsEmtpy = GetEmptyTable(tableName);
string prevType = "", prevColName = "";
List <DataColumn> cols = null;
foreach (DataRow dr in ds.Tables[0].Rows)
{
string constraintName = dr["constraint_name"].ToString();
string columnName = dr["column_name"].ToString();
string constraintType = dr["constraint_type"].ToString();
if (constraintType != prevType || constraintName != prevColName)
{
if (prevType.Length > 0)
{
UniqueConstraint uc = new UniqueConstraint(prevColName, cols.ToArray(), prevType == "P");
dsEmtpy.Tables[0].Constraints.Add(uc);
}
cols = new List <DataColumn>();
}
cols.Add(dsEmtpy.Tables[0].Columns[columnName]);
prevType = constraintType;
prevColName = constraintName;
}
if (prevType.Length > 0)
{
UniqueConstraint uc = new UniqueConstraint(prevColName, cols.ToArray(), prevType == "P");
dsEmtpy.Tables[0].Constraints.Add(uc);
}
return(dsEmtpy.Tables[0].Constraints);
}
catch (CustomDataException exdb)
{
throw exdb;
}
catch (System.Exception ex)
{
throw new CustomDataException(ex, sql);
}
}
/// <summary>
/// 检测某个表是否存在
/// </summary>
/// <param name="tableName">表名称</param>
/// <returns></returns>
public bool TableExists(string tableName)
{
tableName = tableName.ToUpper();
string sql = "select count(*) from sys.user_all_tables where table_name = :tname";
DbParameter[] prams =
{
DbFactory <OracleConn, OracleFactory <OracleConn> > .MakeInParam(":tname", OracleType.VarChar, 30, tableName),
};
return(Convert.ToInt32(ExecuteScalar(sql, prams)) > 0);
}
/// <summary>
/// 检测某个表是否存在,可以在系统表中查看是否存在此名称的表
/// </summary>
/// <param name="tableName">表名</param>
/// <returns></returns>
public bool TableExists(string tableName)
{
tableName = tableName.ToUpper();
string sql = "select count(*) from sys.tables where name = @tname";
DbParameter[] dbParams =
{
DbFactory <SqlServerConn, SqlServerFactory <SqlServerConn> > .MakeInParam("@tname", SqlDbType.VarChar, 30, tableName),
};
return(Convert.ToInt32(base.ExecuteScalar(sql, dbParams)) > 0);
}
/// <summary>
/// 获取某个表的信息
/// cname - 字段名
/// coltype - 字段类型
/// width - 字段长度
/// </summary>
/// <param name="tableName"></param>
/// <returns></returns>
public DataSet GetTableInfo(string tableName)
{
tableName = tableName.ToUpper();
string sql = "select cname, coltype, width from col where tname = :tname";
DbParameter[] dbParams =
{
DbFactory <OracleConn, OracleFactory <OracleConn> > .MakeInParam(":tname", OracleType.VarChar, 30, tableName),
};
IDbOperation db = new OracleExecute();
DataSet dataSet = db.FillDataset(sql, dbParams);
return(dataSet);
}
/// <summary>
/// 获取某个表的信息--SqlServer
/// cname - 字段名
/// coltype - 字段类型
/// width - 字段长度
/// </summary>
/// <param name="tableName">表名</param>
/// <returns>数据集</returns>
public DataSet GetSqlTableInfo(string tableName)
{
tableName = tableName.ToUpper();
string sql = "select col.name as cname, (select name from sys.types where system_type_id= col.system_type_id) as coltype,col.max_length as width"
+ " from sys.columns col where object_id in (select object_id from sys.tables t where t.name = @tname)";
DbParameter[] dbParams =
{
DbFactory <SqlServerConn, SqlServerFactory <SqlServerConn> > .MakeInParam("@tname", SqlDbType.Char, 30, tableName), //此外的","不能省略
};
IDbOperation db = new SqlServerExecute();
DataSet dataSet = db.FillDataset(sql, dbParams);
return(dataSet);
}
public void AutoUpdate(DbTransaction transaction, DataTable dataTable)
{
DataSet dsTable = GetTableInfo(dataTable.TableName);
if (null == dsTable || dsTable.Tables.Count == 0 || dsTable.Tables[0].Rows.Count == 0)
{
throw new Exception("未找到 " + dataTable.TableName + " 表的信息");
}
ConstraintCollection ucList = GetTableConstraint(dataTable.TableName);
if (ucList.Count == 0)
{
throw new Exception("表 " + dataTable.TableName + " 没有主键，无法自动更新");
}
Dictionary <string, bool> keyTable = new Dictionary <string, bool>();
foreach (UniqueConstraint uc in ucList)
{
if (uc == null || uc.Columns.Length == 0)
{
continue;
}
foreach (DataColumn dc in uc.Columns)
{
keyTable[dc.ColumnName] = true;
}
}
StringBuilder sb = new StringBuilder();
sb.Append("update ");
sb.Append(dataTable.TableName);
int idx = 0;
foreach (DataRow dataRow in dsTable.Tables[0].Rows)
{
string cName = dataRow["CNAME"].ToString();
if (dataTable.Columns.Contains(cName) && !keyTable.ContainsKey(cName))
{
if (idx == 0)
{
sb.Append(" set ");
}
else
{
sb.Append(", ");
}
sb.Append(cName);
sb.Append(" = :");
sb.Append(cName);
++idx;
}
}
if (idx == 0)
{
return;
}
idx = 0;
foreach (UniqueConstraint uc in ucList)
{
if (uc == null || uc.Columns.Length == 0)
{
continue;
}
foreach (DataColumn dc in uc.Columns)
{
if (idx == 0)
{
sb.Append(" where ");
}
else
{
sb.Append(" and ");
}
sb.Append(dc.ColumnName);
sb.Append(" = :");
sb.Append(dc.ColumnName);
++idx;
}
}
string sql = sb.ToString();
DbParameter[] parameters = null;
try
{
foreach (DataRow dataRow in dataTable.Rows)
{
List <DbParameter> paramList = new List <DbParameter>();
foreach (DataRow drTable in dsTable.Tables[0].Rows)
{
string cName2 = drTable["cname"].ToString();
if (!dataTable.Columns.Contains(cName2))
{
continue;
}
DbType dbt = OracleDbTypeWrapper.WrapDbType(drTable["coltype"].ToString());
object o = dataRow.IsNull(cName2) ? null : dataRow[cName2];
paramList.Add(DbFactory <OracleConn, OracleFactory <OracleConn> > .MakeInParam(":" + cName2, dbt, Convert.ToInt32(drTable["WIDTH"]), o));
}
parameters = paramList.ToArray();
IDbOperation db = new OracleExecute();
if (transaction == null)
{
db.ExecuteNonQuery(sql, parameters);
}
else
{
db.ExecuteNonQuery(transaction, sql, parameters);
}
}
}
catch (System.Exception ex)
{
throw new CustomDataException(ex, sql, parameters);
}
}
public void AutoProcess(DbTransaction transaction, DataTable dataTable, ExistingItemProcessType processType)
{
if (dataTable.TableName.Length == 0)
{
throw new Exception("表名为空");
}
if (dataTable.Rows.Count == 0)
{
return;
}
string sql = "";
bool owerConnection = transaction == null;
DbConnection conn = null;
DbTransaction tran = null;
try
{
ConstraintCollection ucList = GetTableConstraint(dataTable.TableName);
if (ucList.Count == 0)
{
AutoInsert(null, dataTable);
return;
}
if (owerConnection)
{
conn = CreateConnection();
conn.Open();
tran = conn.BeginTransaction();
}
else
{
conn = transaction.Connection;
tran = transaction;
}
//sql = "select * from " + dt.TableName;
//DataSet ds = ExecuteDataset(tran, sql);
sql = "select count(*) from " + dataTable.TableName + " where ";
Dictionary <string, bool> keyColumnList = new Dictionary <string, bool>();
foreach (UniqueConstraint uc in ucList)
{
if (uc == null || uc.Columns.Length == 0)
{
continue;
}
foreach (DataColumn dc in uc.Columns)
{
keyColumnList[dc.ColumnName] = true;
}
}
int idx = 0;
foreach (string columnName in keyColumnList.Keys)
{
if (idx > 0)
{
sql += " and ";
}
sql += columnName + "=:" + columnName;
++idx;
}
DataSet dsTable = GetTableInfo(dataTable.TableName);
DataTable dtInsert = dataTable.Clone();
DataTable dtExist = dataTable.Clone();
foreach (DataRow dr in dataTable.Rows)
{
DbParameter[] pList = new DbParameter[keyColumnList.Keys.Count];
idx = 0;
foreach (DataRow dr2 in dsTable.Tables[0].Rows)
{
if (keyColumnList.ContainsKey(dr2["cname"].ToString()))
{
pList[idx] = DbFactory <OracleConn, OracleFactory <OracleConn> > .MakeInParam(":" + dr2["cname"].ToString(), OracleDbTypeWrapper.WrapDbType(dr2["coltype"].ToString()), Convert.ToInt32(dr2["width"]), dr[dr2["cname"].ToString()]);
++idx;
}
}
bool bContain = Convert.ToInt32(ExecuteScalar(tran, CommandType.Text, sql, pList)) > 0;
if (!bContain)
{
dtInsert.ImportRow(dr);
}
else
{
dtExist.ImportRow(dr);
}
}
if (dtInsert.Rows.Count > 0)
{
AutoInsert(tran, dtInsert);
}
if (processType == ExistingItemProcessType.Update && dtExist.Rows.Count > 0)
{
AutoUpdate(tran, dtExist);
}
if (owerConnection)
{
tran.Commit();
}
}
catch (System.Exception ex)
{
if (owerConnection)
{
tran.Rollback();
}
throw new CustomDataException(ex, sql);
}
finally
{
if (owerConnection && conn != null)
{
conn.Close();
}
}
}
public void AutoInsert(DbTransaction transaction, DataTable dataTable)
{
DataSet dsTable = GetTableInfo(dataTable.TableName);
if (null == dsTable || dsTable.Tables.Count == 0 || dsTable.Tables[0].Rows.Count == 0)
{
throw new Exception("未找到 " + dataTable.TableName + " 表的信息");
}
StringBuilder sb1 = new StringBuilder();
StringBuilder sb2 = new StringBuilder();
foreach (DataRow drTable1 in dsTable.Tables[0].Rows)
{
string cName = drTable1["CNAME"].ToString();
if (dataTable.Columns.Contains(cName))
{
if (sb1.Length > 0)
{
sb1.Append(", ");
sb2.Append(", ");
}
sb1.Append(cName);
sb2.Append(":" + cName);
}
}
if (sb1.Capacity == 0)
{
return;
}
string sql = "insert into " + dataTable.TableName + " (" + sb1.ToString() + ") values (" + sb2.ToString() + ")";
DbParameter[] parameters = null;
try
{
foreach (DataRow dr in dataTable.Rows)
{
List <DbParameter> paramList = new List <DbParameter>();
foreach (DataRow drTable in dsTable.Tables[0].Rows)
{
string cName2 = drTable["cname"].ToString();
if (!dataTable.Columns.Contains(cName2))
{
continue;
}
DbType dbt = OracleDbTypeWrapper.WrapDbType(drTable["coltype"].ToString());
object o = dr.IsNull(cName2) ? null : dr[cName2];
paramList.Add(DbFactory <OracleConn, OracleFactory <OracleConn> > .MakeInParam(":" + cName2, dbt, Convert.ToInt32(drTable["width"]), o));
}
parameters = paramList.ToArray();
IDbOperation db = new OracleExecute();
if (transaction == null)
{
db.ExecuteNonQuery(sql, parameters);
}
else
{
db.ExecuteNonQuery(transaction, sql, parameters);
}
}
}
catch (System.Exception ex)
{
throw new CustomDataException(ex, sql, parameters);
}
}
/// <summary>
/// 获取表的约束条件
/// constraint_name - 约束名称
/// column_name - 约束的字段
/// constraint_type - 约束类型，PK: 主键，U: 唯一键，R: 外键
/// </summary>
/// <param name="tableName">表名</param>
/// <returns></returns>
public ConstraintCollection GetSqlTableConstraint(string tableName)
{
tableName = tableName.ToUpper();
//此处取SqlServer2008中表的主键列信息，注意建表时主键列排第一列,此处通过列ID来检索
string sql = "select col.name as column_name,con.name as constraint_name,con.type as constraint_type"
+ " from sys.columns col, sys.key_constraints con "
+ " where col.object_id = con.parent_object_id and col.column_id = 1 and col.is_nullable = 0"
+ " and col.object_id in (select object_id from sys.tables where name = @table_name)";
try
{
DbParameter[] dbParams =
{
DbFactory <SqlServerConn, SqlServerFactory <SqlServerConn> > .MakeInParam("@table_name", SqlDbType.VarChar, 30, tableName),
};
IDbOperation db = new SqlServerExecute();
DataSet dataSet = db.FillDataset(sql, dbParams);
DataSet dsEmtpy = GetEmptyTable(tableName);
string prevType = string.Empty;
string prevColumnName = string.Empty;
List <DataColumn> cols = null;
foreach (DataRow dr in dataSet.Tables[0].Rows)
{
string constraintName = dr["constraint_name"].ToString();
string columnName = dr["column_name"].ToString();
string constraintType = dr["constraint_type"].ToString();
if (constraintType != prevType || constraintName != prevColumnName)
{
if (prevType.Length > 0)
{
UniqueConstraint uc = new UniqueConstraint(prevColumnName, cols.ToArray(), prevType == "PK");
dsEmtpy.Tables[0].Constraints.Add(uc);
}
cols = new List <DataColumn>();
}
cols.Add(dsEmtpy.Tables[0].Columns[columnName]);
prevType = constraintType;
prevColumnName = constraintName;
}
if (prevType.Length > 0)
{
UniqueConstraint uc = new UniqueConstraint(prevColumnName, cols.ToArray(), prevType == "PK");
dsEmtpy.Tables[0].Constraints.Add(uc);
}
return(dsEmtpy.Tables[0].Constraints);
}
catch (CustomDataException exdb)
{
throw exdb;
}
catch (System.Exception ex)
{
throw new CustomDataException(ex, sql);
}
}