How do I convert a database object to int in C#?

Question

如何在C＃中将数据库对象转换为int？

int uid = Convert.ToInt32(dt.Rows[0]["userid"].ToString());

Answer 1

You shouldn't convert the object to a string before converting to the int.

int uid = Convert.ToInt32(dt.Rows[0]["userid"]);

If you need to convert a string to an int then use;

int uid = int.Parse("1");

Answer 2

Use Null Check before Converting to integer.

DataRow row=dt.Rows[0];
int uid = row.IsNull("userid") ? 0 : (Convert.ToInt32(dt.Rows[0]["userid"]); 

Answer 3

Int32.Parse（...）... - 你的ToString（）方法