private DataRow getDataRowFromReader(IDataReader reader)
{
DataRow row = new DataRow();
DataTable tbl = new DataTable();
for (int i = 0; i < reader.FieldCount; i++)
{
Type type = reader[i].GetType();
if(type.Equals(Type.GetType("DBNull")) || type.Equals(Type.GetType("System.DBNull")))
type = typeof(string);
DataColumn col = new DataColumn(reader.GetName(i), type);
tbl.Columns.Add(col);
}
row = tbl.NewRow();
for (int i = 0; i < reader.FieldCount; i++)
{
Type readerType = reader[i].GetType();
Type rowType = row[i].GetType();
if (readerType.Equals(rowType))
row[i] = reader.GetValue(i);
else
row[i] = reader.GetString(i);
}
return row;
}
我试图在第一个循环中处理 DBNull,但在第二个循环中,我拥有了由 DBNull 类型的 NewRow() 创建的所有行。
例如 rowType ~ DBNull
为什么会这样?