错误CS0266：无法将类型'object'隐式转换为'int'

Question

error CS0266: Cannot implicitly convert type 'object' to 'int'. An explicit conversion exists (are you missing a cast?)

int dd= 6000;
sqlCmdDefaultTime = new SqlCommand("myQuery", sqlCon);
sqlDefaultTime = sqlCmdDefaultTime.ExecuteReader();
while (sqlDefaultTime.Read())
{
      dd= sqlDefaultTime[1];
}

how can i cast

Answer 1

简单转换为int ：

dd = (int)sqlDefaultTime[1];

Answer 2

Try this...

int.TryParse(sqlDefaultTime[1].ToString(), out dd);

in the event that the parse is successful dd will now be a new value.

Unless of course the object is an int already, the you can just cast it...

dd = (int)sqlDefaultTime[1];

Answer 3

Instead of the indexer try to use the GetXXX methods of SqlDataReader:

dd = sqlDefaultTime.GetInt32(1);

More GetXXX methods here: http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.aspx

Answer 4

Integer.parseInt();

a few others such as TryParse and TryParseExact provide more functionality and control.

dd= Integer.parseInt(sqlDefaultTime[1]); 

should do it, provided you can guarantee the value being returned is always an int.