internal string GetSelectSql(string tableName)
{
StringBuilder sb = new StringBuilder();
sb.Append(" WHERE ");
// foreach( PropertyInfo p in PropertyList )
// {
// string str = GetProperty(p);
// if( str != null && str.Length > 0 )
// sb.Append( p.Name + "=" + GetProperty(p) + "," );
// }
PropertyInfo key = MainKey;
if (key == null)
{
return("");
}
string fname = DObjectHelper.GetFieldName(key);
sb.Append(fname + "=" + GetProperty(key));
string sql = sb.ToString();
sql = sql.TrimEnd(',').Replace(",", " AND ");
sql = GetSelectAllSql(tableName) + sql;
return(sql);
}
internal string GetUpdateSql(string tableName)
{
PropertyInfo[] plist = DObjectHelper.GetInsertablePropertyList(PropertyList);
if (plist == null)
{
return("");
}
PropertyInfo key = MainKey;
if (key == null)
{
return("");
}
string val = GetProperty(key);
StringBuilder sb = new StringBuilder();
sb.Append("UPDATE ");
sb.Append(tableName);
sb.Append(" SET ");
foreach (PropertyInfo p in plist)
{
string fname = DObjectHelper.GetFieldName(p);
sb.Append(fname + "=" + GetProperty(p) + ",");
}
string str = sb.ToString();
string kname = DObjectHelper.GetFieldName(key);
string ostr = str.TrimEnd(',') + " WHERE " + kname + "=" + val;
return(ostr);
}
private DObjectManager(string tableName, Type objectType)
{
_tableName = tableName;
_objectType = objectType;
if (_tableName == null || _tableName.Length < 1 ||
_objectType == null || !DObjectHelper.IsDObject(_objectType))
{
throw new ArgumentNullException("DObjectManager构造函数的参数不能为空，而且传入的objectType参数必须是DObject类型或DObject的派生类型。");
}
}
internal string GetMaxAutoIDSql(string tableName)
{
PropertyInfo key = MainKey;
if (key == null || !DObjectHelper.IsAutoIncrementing(key))
{
return("");
}
string kname = DObjectHelper.GetFieldName(key);
string sql = "SELECT MAX(" + kname + ") FROM " + tableName;
return(sql);
}
internal string GetDeleteSql(string tableName)
{
PropertyInfo key = MainKey;
if (key == null)
{
return("");
}
string val = GetProperty(key);
string fname = DObjectHelper.GetFieldName(key);
string sql = "DELETE FROM " + tableName + " WHERE " + fname + "=" + val;
return(sql);
}
internal bool LoadData(DbDataRecord dbData)
{
if (dbData == null)
{
return(false);
}
PropertyInfo[] plist = PropertyList;
if (plist == null)
{
return(false);
}
foreach (PropertyInfo p in plist)
{
string fname = DObjectHelper.GetFieldName(p);
SetProperty(p, dbData[fname]);
}
return(true);
}
internal string GetSelectAllSql(string tableName)
{
PropertyInfo[] plist = PropertyList;
if (plist == null)
{
return("");
}
StringBuilder sb = new StringBuilder();
sb.Append("SELECT ");
foreach (PropertyInfo p in plist)
{
string fname = DObjectHelper.GetFieldName(p);
sb.Append(fname + ",");
}
string str = sb.ToString().TrimEnd(',');
str = str + " FROM " + tableName;
return(str);
}
internal string GetInsertSql(string tableName)
{
PropertyInfo[] plist = DObjectHelper.GetInsertablePropertyList(PropertyList);
if (plist == null)
{
return("");
}
StringBuilder sb = new StringBuilder();
sb.Append("INSERT INTO ");
sb.Append(tableName);
sb.Append(" (");
foreach (PropertyInfo p in plist)
{
string fname = DObjectHelper.GetFieldName(p);
sb.Append(fname + ",");
}
string str = sb.ToString().TrimEnd(',');
str = str + ") VALUES (";
sb = new StringBuilder();
sb.Append(str);
foreach (PropertyInfo p in plist)
{
sb.Append(GetProperty(p) + ",");
}
str = sb.ToString().TrimEnd(',');
str = str + ")";
return(str);
}
internal string GetCreateTableSql(string tableName)
{
PropertyInfo[] plist = PropertyList;
if (plist == null)
{
return("");
}
StringBuilder sb = new StringBuilder();
sb.Append("CREATE TABLE ");
sb.Append(tableName + " (");
foreach (PropertyInfo p in plist)
{
string finfo = DObjectHelper.GetFileInfor(p);
sb.Append(finfo + ",");
}
string str = sb.ToString().TrimEnd(',');
str = str + ")";
return(str);
}
