using Oracle.ManagedDataAccess.Client;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
namespace Midea.MES.Server.Common.Oracle
{
/// <summary>
/// </summary>
public class DBHelper
{
public static DataSet GetDataSet(string strConn, string strSql, Params ps = null)
{
DataTableSchema schema = null;
return GetDataSet(strConn, strSql, out schema, ps);
}
public static DataSet GetDataSet(string strConn, string strSql, out DataTableSchema dts, Params ps = null)
{
OracleConnectionStringBuilder ocsb = new OracleConnectionStringBuilder(strConn);
ocsb.ConnectionLifeTime = 2;//
ocsb.MetadataPooling = false;//不缓存查询语句返回的表结构信息（因为表结构改变后，查询结果将改变）
dts = null;
DataSet dsRet = new DataSet("ds");
using (OracleConnection conn = new OracleConnection(ocsb.ConnectionString))
{
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
cmd.CommandText = strSql;
PrepareCommandParameters(cmd, ps);
using (OracleDataReader sdr = cmd.ExecuteReader())
{
string tbName = string.Format("dt{0}", dsRet.Tables.Count);
DataTable dtRet = new DataTable(tbName);
var dtSchema = sdr.GetSchemaTable();
if (dtSchema != null)
{
dts = new DataTableSchema(dtSchema, dtRet);
foreach (var s in dts)
{
dtRet.Columns.Add(s.ColumnName, s.DataType);
}
while (sdr.Read())
{
DataRow dr = dtRet.NewRow();
object[] objs = new object[sdr.FieldCount];
sdr.GetValues(objs);
dr.ItemArray = objs;
dtRet.Rows.Add(dr);
}
dtRet.AcceptChanges();
dsRet.Tables.Add(dtRet);
}
sdr.Close();
}
cmd.Dispose();
conn.Close();
}
dsRet.AcceptChanges();
return dsRet;
}
public static DataTableSchema GetDataTableSchema(string strConn, string tbName, string tbComments = "")
{
DataTableSchema dts;
GetDataSet(strConn, string.Format("SELECT * FROM {0} WHERE 1=0", tbName), out dts);
dts.TableComments = tbComments;
dts.TableName = tbName;
DataTable colComments = GetDataTable(strConn, string.Format("SELECT C.COLUMN_NAME,C.DATA_TYPE,C.DATA_LENGTH,C.DATA_PRECISION,C.DATA_SCALE,C.DEFAULT_LENGTH,C.DATA_DEFAULT,S.COMMENTS FROM USER_TAB_COLS C LEFT JOIN USER_COL_COMMENTS S ON S.COLUMN_NAME = C.COLUMN_NAME AND S.TABLE_NAME = C.TABLE_NAME WHERE C.TABLE_NAME=‘{0}‘", tbName));
foreach (DataRow dr in colComments.Rows)
{
var colName = dr["COLUMN_NAME"].ToString().ToUpper();
var col = dts[colName];
col.DATA_TYPE = dr["DATA_TYPE"].ToString();
col.DATA_DEFAULT = dr["DATA_DEFAULT"].ToString();
if (string.IsNullOrEmpty(dr["DATA_PRECISION"].ToString()))
{
col.NumericPrecision = 0;
}
else
{
col.NumericPrecision = Convert.ToInt16(dr["DATA_PRECISION"]);
}
if (string.IsNullOrEmpty(dr["DATA_SCALE"].ToString()))
{
col.NumericScale = 0;
}
else
{
col.NumericScale = Convert.ToInt16(dr["DATA_SCALE"]);
}
col.ColumnComments = dr["COMMENTS"].ToString();
}
DataTable dtPKCols = GetDataTable(strConn, string.Format(@"SELECT cc.COLUMN_NAME,cc.POSITION,c.CONSTRAINT_NAME FROM user_constraints c
LEFT JOIN user_cons_columns cc ON cc.OWNER = c.OWNER AND cc.CONSTRAINT_NAME = c.CONSTRAINT_NAME AND cc.TABLE_NAME = c.TABLE_NAME
WHERE c.CONSTRAINT_TYPE=‘P‘ AND c.TABLE_NAME=‘{0}‘
ORDER BY cc.POSITION", tbName));
dts.TablePKCols = new List<string>();
if (dtPKCols.Rows.Count > 0)
{
dts.TablePKConstraintName = dtPKCols.Rows[0]["CONSTRAINT_NAME"].ToString();
foreach (DataRow dr in dtPKCols.Rows)
{
var colName = dr["COLUMN_NAME"].ToString().ToUpper();
dts.TablePKCols.Add(colName);
dts[colName].IsKey = true;
}
}
return dts;
}
public static DataTable GetDataTable(string strConn, string strSql, Params ps = null)
{
DataSet ds = GetDataSet(strConn, strSql, ps);
return ds.Tables[0];
}
public static object GetSingle(string strConn, string strSql, Params ps = null)
{
DataSet ds = GetDataSet(strConn, strSql, ps);
if (ds.Tables[0].Rows.Count > 0)
{
return ds.Tables[0].Rows[0][0];
}
return null;
}
public static DataSet QueryDS(string strConn, string strSql, Params ps = null)
{
OracleConnectionStringBuilder ocsb = new OracleConnectionStringBuilder(strConn);
DataSet ds = new DataSet("ds");
using (OracleConnection conn = new OracleConnection(ocsb.ConnectionString))
{
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
OracleDataAdapter oda = new OracleDataAdapter(strSql, conn);
PrepareCommandParameters(oda.SelectCommand, ps);
oda.Fill(ds);
}
return ds;
}
public static DataSet QueryDS(string strConn, string strSql, out DataTableSchema dts, Params ps = null)
{
OracleConnectionStringBuilder ocsb = new OracleConnectionStringBuilder(strConn);
dts = null;
DataSet ds = new DataSet("ds");
using (OracleConnection conn = new OracleConnection(ocsb.ConnectionString))
{
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
OracleDataAdapter oda = new OracleDataAdapter(strSql, conn);
PrepareCommandParameters(oda.SelectCommand, ps);
oda.Fill(ds);
var dtSchema = oda.SelectCommand.ExecuteReader(CommandBehavior.KeyInfo).GetSchemaTable();
if (dtSchema != null)
{
dts = new DataTableSchema(dtSchema, ds.Tables[0]);
}
}
return ds;
}
public static DataTable Query(string strConn, string strSql, Params ps = null)
{
DataSet ds = QueryDS(strConn, strSql, ps);
if (ds.Tables.Count > 0)
{
return ds.Tables[0];
}
throw new Exception("此查询无结果表！");
}
public static List<TModel> QueryEntitys<TModel>(string strConn, string strSql, Params ps = null) where TModel : new()
{
var dt = Query(strConn, strSql, ps);
return dt.ToEntityList<TModel>();
}
public static TModel QueryEntity<TModel>(string strConn, string strSql, Params ps = null) where TModel : new()
{
var list = QueryEntitys<TModel>(strConn, strSql, ps);
if (list.Count > 0)
{
return list[0];
}
return default(TModel);
}
public static object QuerySingle(string strConn, string strSql, Params ps = null)
{
var ds = QueryDS(strConn, strSql, ps);
if (ds.Tables.Count > 0)
{
if (ds.Tables[0].Rows.Count > 0 && ds.Tables[0].Columns.Count > 0)
{
return ds.Tables[0].Rows[0][0];
}
}
return null;
}
public static int ExecuteSql(string strConn, string strSql, Params ps = null)
{
TableSql ts = new TableSql();
ts.Sql = strSql;
ts.ParamsList.Add(ps);
return ExecuteSql(strConn, ts);
}
public static int ExecuteSql(string strConn, string strSql, bool autoSplit, Params ps = null)
{
if (autoSplit)
{
TableSqls tss = new TableSqls();
var sqls = strSql.SplitOracleSql();
foreach (var sql in sqls)
{
TableSql ts = new TableSql();
ts.Sql = sql;
ts.ParamsList.Add(ps);
tss.Add(ts);
}
return ExecuteSql(strConn, tss);
}
else
{
return ExecuteSql(strConn, strSql, ps);
}
}
public static int ExecuteSql(string strConn, TableSql ts)
{
TableSqls tss = new TableSqls();
tss.Add(ts);
return ExecuteSql(strConn, tss);
}
public static int ExecuteSql(string strConn, TableSqls tss)
{
using (OracleConnection conn = new OracleConnection(strConn))
{
if (conn.State != ConnectionState.Open)
{
conn.Open();
}
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
if (tss.Count == 0)
{
throw new Exception("无查询语句！");
}
else
{
int iCount = 0;
foreach (var ts in tss)
{
foreach (var ps in ts.ParamsList)
{
PrepareCommandParameters(cmd, ps);
cmd.CommandText = ts.Sql;
iCount += cmd.ExecuteNonQuery();
}
}
return iCount;
}
}
}
static void PrepareCommandParameters(OracleCommand cmd, Params ps)
{
cmd.Parameters.Clear();
cmd.BindByName = true;
if (ps != null)
{
foreach (var p in ps)
{
cmd.Parameters.Add(new OracleParameter(p.Name, p.Value));
}
}
}
public static object ExecProcSingle(string strConn, string procName, Params ps = null)
{
var dt = ExecProc(strConn, procName, ps);
if (dt.Rows.Count > 0 && dt.Columns.Count > 0)
{
return dt.Rows[0][0];
}
return null;
}
public static TModel ExecProcEntity<TModel>(string strConn, string procName, Params ps = null) where TModel : new()
{
var list = ExecProcEntitys<TModel>(strConn, procName, ps);
if (list.Count > 0)
{
return list[0];
}
return default(TModel);
}
public static List<TModel> ExecProcEntitys<TModel>(string strConn, string procName, Params ps = null) where TModel : new()
{
var dt = ExecProc(strConn, procName, ps);
return dt.ToEntityList<TModel>();
}
public static DataTable ExecProc(string strConn, string procName, Params ps = null)
{
var ds = ExecProcDS(strConn, procName, ps);
if (ds.Tables.Count > 0)
{
return ds.Tables[0];
}
return new DataTable();
}
public static DataSet ExecProcDS(string strConn, string procName, Params ps = null)
{
using (OracleConnection conn = new OracleConnection(strConn))
{
using (OracleCommand cmd = new OracleCommand(procName, conn))
{
using (OracleDataAdapter oda = new OracleDataAdapter(cmd))
{
conn.Open();
cmd.CommandType = CommandType.StoredProcedure;
OracleCommandBuilder.DeriveParameters(cmd);
if (ps != null)
{
foreach (var p in ps)
{
if (p.Direction == ParamDirection.Input || p.Direction == ParamDirection.InputOutput)
{
if (cmd.Parameters.Contains(p.Name))
{
cmd.Parameters[p.Name].Value = p.Value;
}
else
{
throw new Exception(string.Format("调用存储过程时，提供了多余的参数“{0}”！", p.Name));
}
}
}
}
DataSet ds = new DataSet();
oda.Fill(ds);
if (ps != null)
{
foreach (var p in ps)
{
if (p.Direction != ParamDirection.Input)
{
p.Value = cmd.Parameters[p.Name].Value;
}
}
}
conn.Close();
return ds;
}
}
}
}
}
public static class DataTableEx
{
public static TableSqls GenerateSql(this DataTable dt, string tbName, string pkcol)
{
return GenerateSql(dt, tbName, new string[] { pkcol });
}
public static TableSqls GenerateSql(this DataTable dt, string tbName, string[] pkcols)
{
TableSqls sqls = new TableSqls();
sqls.Add(dt.GenerateDelete(tbName, pkcols));
sqls.Add(dt.GenerateUpdate(tbName, pkcols));
sqls.Add(dt.GenerateInsert(tbName));
return sqls;
}
/// <summary>
/// KeyValuePair.Key为insert sql；KeyValuePair.Value为多个DataRow对应的参数，Params则为一条语句的参数
/// </summary>
public static TableSql GenerateInsert(this DataTable dt, string tbName)
{
var cols = GetCompressColumnName(dt);
var insertCols = new List<string>();
var insertValues = new List<string>();
foreach (var item in cols)
{
insertCols.Add(item.Key);
insertValues.Add(":" + item.Value);
}
var ts = new TableSql();
ts.Sql = string.Format("Insert Into {0}({1})Values({2})", tbName, string.Join(",", insertCols), string.Join(",", insertValues));
ts.OperateType = OperateType.Add;
for (int i = 0; i < dt.Rows.Count; i++)
{
var dr = dt.Rows[0];
if (dr.RowState == DataRowState.Added)
{
var ps = new Params();
foreach (DataColumn dc in dt.Columns)
{
ps.Add(new Param() { Name = cols[dc.ColumnName], Value = dr[dc.ColumnName] });
}
ts.ParamsList.Add(ps);
}
}
return ts;
}
/// <summary>
/// KeyValuePair.Key为insert sql；KeyValuePair.Value为多个DataRow对应的参数，Params则为一条语句的参数
/// </summary>
public static TableSql GenerateUpdate(this DataTable dt, string tbName, string pkcol)
{
return GenerateUpdate(dt, tbName, new string[] { pkcol });
}
/// <summary>
/// KeyValuePair.Key为insert sql；KeyValuePair.Value为多个DataRow对应的参数，Params则为一条语句的参数
/// </summary>
public static TableSql GenerateUpdate(this DataTable dt, string tbName, string[] pkcols)
{
var cols = GetCompressColumnName(dt);
var dicPKS = new Dictionary<string, object>();
foreach (var pkcol in pkcols)
{
dicPKS.Add(pkcol.ToUpper(), null);
}
var conditions = new List<string>();
var updateCols = new List<string>();
foreach (DataColumn dc in dt.Columns)
{
if (dicPKS.ContainsKey(dc.ColumnName.ToUpper()))
{
conditions.Add(string.Format("({0}=:{1})", dc.ColumnName, cols[dc.ColumnName]));
}
else
{
updateCols.Add(string.Format(" {0}=:{1} ", dc.ColumnName, cols[dc.ColumnName]));
}
}
var ts = new TableSql();
ts.Sql = string.Format("Update {0} Set {1} Where {2}", tbName, string.Join(",", updateCols), string.Join(" And ", conditions));
ts.OperateType = OperateType.Update;
for (int i = 0; i < dt.Rows.Count; i++)
{
var dr = dt.Rows[0];
if (dr.RowState == DataRowState.Modified)
{
var ps = new Params();
foreach (DataColumn dc in dt.Columns)
{
ps.Add(new Param() { Name = cols[dc.ColumnName], Value = dr[dc.ColumnName] });
}
ts.ParamsList.Add(ps);
}
}
return ts;
}
/// <summary>
/// KeyValuePair.Key为insert sql；KeyValuePair.Value为多个DataRow对应的参数，Params则为一条语句的参数
/// </summary>
public static TableSql GenerateDelete(this DataTable dt, string tbName, string pkcol)
{
return GenerateDelete(dt, tbName, new string[] { pkcol });
}
/// <summary>
/// KeyValuePair.Key为insert sql；KeyValuePair.Value为多个DataRow对应的参数，Params则为一条语句的参数
/// </summary>
public static TableSql GenerateDelete(this DataTable dt, string tbName, string[] pkcols)
{
var cols = GetCompressColumnName(dt);
var conditions = new List<string>();
foreach (var pkcol in pkcols)
{
conditions.Add(string.Format("({0}=:{1})", pkcol, cols[pkcol]));
}
var ts = new TableSql();
ts.Sql = string.Format("Delete From {0} Where {1}", tbName, string.Join(" And ", conditions));
ts.OperateType = OperateType.Delete;
for (int i = 0; i < dt.Rows.Count; i++)
{
var dr = dt.Rows[0];
if (dr.RowState == DataRowState.Deleted)
{
var ps = new Params();
foreach (var pkcol in pkcols)
{
ps.Add(new Param() { Name = cols[pkcol], Value = dr[pkcol, DataRowVersion.Original] });
}
ts.ParamsList.Add(ps);
}
}
return ts;
}
/// <summary>
/// KeyValuePair.Key为insert sql；KeyValuePair.Value为多个DataRow对应的参数，Params则为一条语句的参数
/// </summary>
public static Dictionary<string, string> GetCompressColumnName(this DataTable dt)
{
var dic = new Dictionary<string, string>();
foreach (DataColumn dc in dt.Columns)
{
dic.Add(dc.ColumnName, "p" + dic.Count.ToString());
}
return dic;
}
/// <summary>
/// </summary>
/// <typeparam name="TModel"></typeparam>
/// <param name="dt"></param>
/// <returns></returns>
public static List<TModel> ToEntityList<TModel>(this DataTable dt) where TModel : new()
{
List<TModel> list = new List<TModel>();
Type t = typeof(TModel);
if (dt != null)
{
var ps = t.GetProperties();
foreach (DataRow dr in dt.Rows)
{
TModel obj = new TModel();
foreach (var p in ps)
{
if (p.CanWrite && dt.Columns.Contains(p.Name))
{
object value = dr[p.Name];
if (value != DBNull.Value)
{
p.SetValue(obj, dr[p.Name], null);
}
}
}
list.Add(obj);
}
}
return list;
}
}
[Serializable]
public class Param
{
public string Name { get; set; }
public ParamDirection Direction { get; set; }
public dynamic Value { get; set; }
}
public enum ParamDirection
{
/// <summary>
/// 参数是输入参数。
/// </summary>
Input = 1,
/// <summary>
/// 参数是输出参数。
/// </summary>
Output = 2,
/// <summary>
/// 参数既能输入，也能输出。
/// </summary>
InputOutput = 3,
/// <summary>
/// 参数表示诸如存储过程、内置函数或用户定义函数之类的操作的返回值。
/// </summary>
ReturnValue = 6
}
[Serializable]
public class Params : List<Param>
{
public Param this[string name]
{
get
{
foreach (var p in this)
{
if (string.Equals(p.Name, name, StringComparison.OrdinalIgnoreCase))
{
return p;
}
}
return null;
}
}
public bool Contains(string name)
{
return (this[name] != null);
}
public Param Add(string name, ParamDirection direction = ParamDirection.Input)
{
var p = new Param();
p.Name = name;
p.Direction = direction;
base.Add(p);
return p;
}
public Param Add(string name, dynamic value, ParamDirection direction = ParamDirection.Input)
{
var p = Add(name, direction);
p.Value = value;
return p;
}
}
public enum OperateType
{
Add = 1,
Update = 2,
Delete = 3
}
[Serializable]
public class TableSql
{
public string Sql { get; set; }
public List<Params> ParamsList { get; set; }
public OperateType OperateType { get; set; }
public TableSql()
{
Sql = "";
ParamsList = new List<Params>();
}
}
[Serializable]
public class TableSqls : List<TableSql>
{
}
public static class SqlEx
{
public static List<string> SplitOracleSql(this string sql)
{
var sqls = (sql.Trim() + Environment.NewLine).Split(new string[] { ";" + Environment.NewLine }, StringSplitOptions.None);
List<string> list = new List<string>();
for (int i = 0; i < sqls.Length; i++)
{
if (!string.IsNullOrWhiteSpace(sqls[i]))
{
list.Add(sqls[i]);
}
}
return list;
}
}
[Serializable]
public class DataTableSchema : IEnumerable<DataColumnSchema>
{
DataTable _dtSchema;
List<DataColumnSchema> _list;
Dictionary<string, DataColumnSchema> _cache;
public DataTable Ownner { get; private set; }
/// <summary>
/// 表名，默认为空
/// </summary>
public string TableName { get; set; }
/// <summary>
/// 表注释，默认为空
/// </summary>
public string TableComments { get; set; }
/// <summary>
/// 主键列，默认为空
/// </summary>
public List<string> TablePKCols { get; set; }
/// <summary>
/// 主键约束的名称
/// </summary>
public string TablePKConstraintName { get; set; }
public DataTableSchema(DataTable dtSchema, DataTable ownner)
{
if (dtSchema == null)
{
throw new ArgumentNullException("dtSchema");
}
if (ownner == null)
{
throw new ArgumentNullException("ownner");
}
TableName = "";
TableComments = "";
TablePKCols = new List<string>();
this.Ownner = ownner;
_dtSchema = dtSchema;
_list = new List<DataColumnSchema>();
_cache = new Dictionary<string, DataColumnSchema>();
foreach (DataRow dr in _dtSchema.Rows)
{
DataColumnSchema s = new DataColumnSchema(dr);
_list.Add(s);
_cache.Add(s.ColumnName, s);
}
}
public DataTableSchema Columns
{
get { return this; }
}
public DataColumnSchema this[int idx]
{
get
{
if (idx >= 0 && idx < _list.Count)
{
return _list[idx];
}
return null;
}
}
public DataColumnSchema this[string columnName]
{
get
{
DataColumnSchema dcs = null;
_cache.TryGetValue(columnName, out dcs);
return dcs;
}
}
public int Count
{
get { return _list.Count; }
}
IEnumerator<DataColumnSchema> IEnumerable<DataColumnSchema>.GetEnumerator()
{
return _list.GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator()
{
return _list.GetEnumerator();
}
public string GenerateTableCreateSql(string tbName)
{
List<string> cols = new List<string>();
foreach (var item in _list)
{
cols.Add(item.GetDefinitionSql() + Environment.NewLine);
}
return string.Format("CREATE TABLE {0}({1})", tbName, string.Join(",", cols));
}
}
[Serializable]
public class DataColumnSchema
{
DataRow _dr;
public DataColumnSchema(DataRow dr)
{
ColumnComments = string.Empty;
_dr = dr;
if (!_dr.Table.Columns.Contains("DATA_TYPE"))
{
_dr.Table.Columns.Add("DATA_TYPE", typeof(string));
}
if (!_dr.Table.Columns.Contains("DATA_DEFAULT"))
{
_dr.Table.Columns.Add("DATA_DEFAULT", typeof(string));
}
}
/// <summary>
/// 列注释，默认为空
/// </summary>
public string ColumnComments { get; set; }
public String ColumnName
{
get
{
return (String)_dr["ColumnName"];
}
}
public Int32 ColumnOrdinal
{
get
{
Int32 result;
Int32.TryParse(_dr["ColumnOrdinal"].ToString(), out result);
return result;
}
}
public Int32 ColumnSize
{
get
{
Int32 result;
Int32.TryParse(_dr["ColumnSize"].ToString(), out result);
return result;
}
}
public Int16 NumericPrecision
{
get
{
Int16 result;
Int16.TryParse(_dr["NumericPrecision"].ToString(), out result);
return result;
}
set
{
_dr["NumericPrecision"] = value;
}
}
public Int16 NumericScale
{
get
{
Int16 result;
Int16.TryParse(_dr["NumericScale"].ToString(), out result);
return result;
}
set
{
_dr["NumericScale"] = value;
}
}
public Boolean IsUnique
{
get
{
object obj = _dr["IsUnique"];
return obj == DBNull.Value ? false : (Boolean)obj;
}
}
public Boolean IsKey
{
get
{
object obj = _dr["IsKey"];
return obj == DBNull.Value ? false : (Boolean)obj;
}
set
{
_dr["IsKey"] = value;
}
}
public Boolean IsRowID
{
get
{
object obj = _dr["IsRowID"];
return obj == DBNull.Value ? false : (Boolean)obj;
}
}
public String BaseColumnName
{
get
{
return (String)_dr["BaseColumnName"];
}
}
public String BaseSchemaName
{
get
{
return (String)_dr["BaseSchemaName"];
}
}
public String BaseTableName
{
get
{
return (String)_dr["BaseTableName"];
}
}
public Type DataType
{
get
{
return (Type)_dr["DataType"];
}
}
public OracleDbType ProviderType
{
get
{
return (OracleDbType)_dr["ProviderType"];
}
}
public Boolean AllowDBNull
{
get
{
object obj = _dr["AllowDBNull"];
return obj == DBNull.Value ? false : (Boolean)obj;
}
}
public Boolean IsAliased
{
get
{
object obj = _dr["IsAliased"];
return obj == DBNull.Value ? false : (Boolean)obj;
}
}
public Boolean IsByteSemantic
{
get
{
object obj = _dr["IsByteSemantic"];
return obj == DBNull.Value ? false : (Boolean)obj;
}
}
public Boolean IsExpression
{
get
{
object obj = _dr["IsExpression"];
return obj == DBNull.Value ? false : (Boolean)obj;
}
}
public Boolean IsHidden
{
get
{
object obj = _dr["IsHidden"];
return obj == DBNull.Value ? false : (Boolean)obj;
}
}
public Boolean IsReadOnly
{
get
{
object obj = _dr["IsReadOnly"];
return obj == DBNull.Value ? false : (Boolean)obj;
}
}
public Boolean IsLong
{
get
{
object obj = _dr["IsLong"];
return obj == DBNull.Value ? false : (Boolean)obj;
}
}
public string DATA_TYPE
{
get
{
return _dr["DATA_TYPE"].ToString();
}
set
{
_dr["DATA_TYPE"] = value;
}
}
/// <summary>
/// 系统表的LONG类型未能获取到值
/// </summary>
public string DATA_DEFAULT
{
get
{
return _dr["DATA_DEFAULT"].ToString();
}
set
{
_dr["DATA_DEFAULT"] = value;
}
}
public string GetDefinitionSql()
{
string size = string.Empty;
string type = this.ProviderType.ToString().ToUpper();
switch (this.ProviderType)
{
case OracleDbType.BinaryDouble:
{
type = "BINARY_DOUBLE";
}
break;
case OracleDbType.BinaryFloat:
{
type = "BINARY_FLOAT";
}
break;
case OracleDbType.Single:
case OracleDbType.Double:
{
type = "FLOAT";
size = string.Format("({0})", this.NumericPrecision);
}
break;
case OracleDbType.Decimal:
{
type = "NUMBER";
}
break;
case OracleDbType.Int16:
case OracleDbType.Int32:
case OracleDbType.Int64:
{
type = "NUMBER";
size = string.Format("({0})", this.NumericPrecision);
}
break;
case OracleDbType.LongRaw:
{
type = "LONG RAW";
}
break;
case OracleDbType.Char:
case OracleDbType.NChar:
case OracleDbType.Varchar2:
case OracleDbType.NVarchar2:
{
size = string.Format("({0})", this.ColumnSize);
}
break;
case OracleDbType.Blob:
break;
case OracleDbType.Byte:
break;
case OracleDbType.Clob:
break;
case OracleDbType.Date:
break;
case OracleDbType.BFile:
break;
case OracleDbType.Long:
break;
case OracleDbType.IntervalDS:
break;
case OracleDbType.IntervalYM:
break;
case OracleDbType.NClob:
break;
case OracleDbType.Raw:
break;
case OracleDbType.RefCursor:
break;
case OracleDbType.TimeStamp:
break;
case OracleDbType.TimeStampLTZ:
break;
case OracleDbType.TimeStampTZ:
break;
case OracleDbType.XmlType:
break;
default:
break;
}
if (!string.IsNullOrEmpty(this.DATA_TYPE))
{
type = this.DATA_TYPE;
}
return string.Format("{0} {1} {2} {3} {4}", this.ColumnName, type, size, this.AllowDBNull ? "" : "NOT NULL", this.DATA_DEFAULT);
}
public string GetDefaultValueDefinitionSql()
{
return string.Format("{0} {1}", this.ColumnName, this.DATA_DEFAULT);
}
}
}本文出自 “畅想天空” 博客，请务必保留此出处http://kinwar.blog.51cto.com/3723399/1728224
原文地址：http://kinwar.blog.51cto.com/3723399/1728224
