public RETTYPE ExecuteScale <T, RETTYPE>(IDbConnection conn, string strExpression, string strSql, params object[] parameters) where T : class
{
RETTYPE result;
try
{
Type typeFromHandle = typeof(T);
TableMap tableMap = TableMapFactory.Instance[typeFromHandle];
if (null == tableMap)
{
throw new ORMException("构造" + typeFromHandle.FullName + "的映射产生错误");
}
if (strSql == null || strSql.Trim().Length < 1)
{
strSql = "select " + strExpression + " from " + tableMap.TableName;
}
else if (strSql.Trim().ToLower().StartsWith("order"))
{
strSql = string.Concat(new string[]
{
"select ",
strExpression,
" from ",
tableMap.TableName,
" ",
strSql
});
}
else if (!strSql.Trim().ToLower().StartsWith("select"))
{
if (!strSql.Trim().ToLower().StartsWith("where "))
{
strSql = "where " + strSql;
}
strSql = string.Concat(new string[]
{
"select ",
strExpression,
" from ",
tableMap.TableName,
" ",
strSql
});
}
IDbCommand dbCommand = this.PrepareCommand(conn, strSql, parameters);
object obj = dbCommand.ExecuteScalar();
if (obj.Equals(DBNull.Value))
{
obj = null;
}
if (this.Verbose)
{
this.VerboseInfo(dbCommand);
}
result = (RETTYPE)((object)this.m_type2DbType.GetNullValue(typeof(RETTYPE), obj));
}
catch (Exception ex)
{
throw ex;
}
return(result);
}
public string GetTableNameFromType(Type t)
{
TableMap tableMap = this[t];
return((tableMap == null) ? t.Name : tableMap.TableName);
}
public int Update(IDbConnection conn, object obj, string[] fieldUpdate, string[] fieldWhere)
{
if (obj == null || conn == null)
{
throw new ORMException((obj == null) ? "输入的对象为空！" : "数据库连接为空！");
}
TableMap tableMap = TableMapFactory.Instance[obj];
if (tableMap == null || null == tableMap.MappedFields)
{
throw new ORMException("构造" + obj.GetType().FullName + "的映射产生错误");
}
if (fieldWhere == null || fieldWhere.Length < 1)
{
List <FieldAttribute> primaryKeys = tableMap.PrimaryKeys;
if (null != primaryKeys)
{
fieldWhere = new string[primaryKeys.Count];
for (int i = 0; i < primaryKeys.Count; i++)
{
fieldWhere[i] = primaryKeys[i].TableFiled;
}
}
}
string text = "";
if (fieldWhere != null)
{
string[] array = fieldWhere;
for (int j = 0; j < array.Length; j++)
{
string text2 = array[j];
FieldAttribute fieldAttribute = tableMap[text2];
if (null == fieldAttribute)
{
throw new ORMException(obj.GetType().FullName + "的映射产生错误:无法找到" + text2 + "的字段映射");
}
text = text + "[" + fieldAttribute.TableFiled.Trim().ToUpper() + "]";
}
}
string text3 = "";
string text4 = "";
IDbCommand dbCommand = this.PrepareCommand(conn, null, null);
List <FieldAttribute> list = tableMap.MappedFields;
if (fieldUpdate != null && fieldUpdate.Length > 0)
{
list = new List <FieldAttribute>();
for (int j = 0; j < fieldUpdate.Length; j++)
{
string strFieldName = fieldUpdate[j];
FieldAttribute fieldAttribute2 = tableMap[strFieldName];
if (null != fieldAttribute2)
{
list.Add(fieldAttribute2);
}
}
}
foreach (FieldAttribute fieldAttribute in list)
{
//FieldAttribute fieldAttribute;
if (text.IndexOf("[" + fieldAttribute.TableFiled.ToUpper() + "]") < 0)
{
if (text4.Length > 0)
{
text4 += ",";
}
if (!this.m_type2DbType.IsDbNullValue(fieldAttribute.GetValue(obj)))
{
string parameterName = this.GetParameterName(fieldAttribute.TableFiled);
text4 = text4 + fieldAttribute.TableFiled + "=" + parameterName;
IDbDataParameter value = this.CreateParameter(dbCommand, fieldAttribute, parameterName, obj);
dbCommand.Parameters.Add(value);
}
else
{
text4 = text4 + fieldAttribute.TableFiled + "=null";
}
}
}
foreach (FieldAttribute fieldAttribute in list)
{
//FieldAttribute fieldAttribute;
if (text.IndexOf("[" + fieldAttribute.TableFiled.ToUpper() + "]") >= 0)
{
string parameterName = this.GetParameterName(fieldAttribute.TableFiled);
IDbDataParameter value = this.CreateParameter(dbCommand, fieldAttribute, parameterName, obj);
if (text3.Length > 0)
{
text3 += " and ";
}
text3 = text3 + fieldAttribute.TableFiled + "=" + parameterName;
dbCommand.Parameters.Add(value);
}
}
if (text4 == null || text4.Length < 1)
{
throw new ORMException(obj.GetType().FullName + "的映射产生错误:无法找到可更新的字段");
}
if (text3 == null || text3.Trim().Length < 1)
{
throw new ORMException(obj.GetType().FullName + "的映射产生错误:找不到更新数据库表格的可参考字段");
}
text3 = " where " + text3;
string format = "update {0} set {1} {2}";
dbCommand.CommandText = string.Format(format, tableMap.TableName, text4, text3);
if (this.Verbose)
{
this.VerboseInfo(dbCommand);
}
return(dbCommand.ExecuteNonQuery());
}