internal static String BuildColumnName(ColumnSchema schema, String freeFormat, String tableName = null)
{
String result = schema.Name;
//#if Oracle
// //Oracle 关键词冲突除了添加双引号外还需要大写冲突的名称
// result = result.ToUpper();
//#endif
result = String.Format(freeFormat, schema.Name);
if (!schema.DisableColumnSpecifically && tableName != null)
{
result = String.Format(CommonFormat.COLUMN_FORMAT, tableName, result);
}
return(result);
}
/// <summary>
/// 通过类的属性信息构造一个<see cref="ColumnSchema"/> 对象
/// </summary>
/// <param name="propertyInfo"></param>
/// <returns></returns>
private static ColumnSchema GetColumnSchema(PropertyInfo propertyInfo)
{
ColumnSchema schema = null;
Object[] attrs = propertyInfo.GetCustomAttributes(_ColumnAttrType, true);
if (attrs.Length > 0)
{
ColumnAttribute attr = attrs[0] as ColumnAttribute;
schema = ConvertToColumnSchema(attr);
}
else
{
schema = DeduceColumnSchema(propertyInfo);
}
return(schema);
}
public static void UpdateConvert(DbProvider dbProvider, T obj, SQLComponent component)
{
StringBuilder updateColumnNames = new StringBuilder();
Int32 length = Table <T> .Schema.PropertyInfos.Length;
for (Int32 i = 0; i < length; ++i)
{
PropertyInfo info = Table <T> .Schema.PropertyInfos[i];
ColumnSchema colSchema = Table <T> .Schema.GetColumnSchema(info.Name);
if (colSchema.IsPrimaryKey)
{
continue;
}
if (colSchema.IsJoinColumn)
{
continue;
}
Object value = Table <T> .Schema.PropertyAccessor.GetValue(i, obj);
if (value == null)
{
continue;
}
String columnName = colSchema.Name;
String parameterName = dbProvider.Prefix + columnName + ParaCounter <T> .CountString;
DbParameter dbParameter = dbProvider.DbParameter
(
parameterName,
value ?? DBNull.Value,
colSchema.DbType
);
updateColumnNames.Append(String.Format(dbProvider.ConflictFreeFormat, columnName));
updateColumnNames.Append(SqlKeyWord.EQUAL);
updateColumnNames.Append(parameterName);
updateColumnNames.Append(SqlKeyWord.COMMA);
component.AddParameter(dbParameter);
}
updateColumnNames.Remove(updateColumnNames.Length - SqlKeyWord.COMMA.Length, SqlKeyWord.COMMA.Length);
component.AppendSQLFormat(BasicSqlFormat.UPDATE_FORMAT, Table <T> .Schema.TableName, updateColumnNames.ToString());
}
