Question

我检查了参数和字段，没有任何错误，但我仍然得到错误..

        StringBuilder sb = new StringBuilder();
    sb.Append("SELECT u.Name,t.ThreadTitle,t.Date, t.Views,t.Replies,p.Theme,p.Topics,t.PageNumber");
    sb.Append("FROM Users AS u");
    sb.Append("INNER JOIN Threads AS t ON u.UserID=t.UserID");
    sb.Append("INNER JOIN Topics AS p ON p.TopicID=t.TopicID");
    sb.Append("WHERE u.UserID=@UserID");
    sb.Append("ORDER BY t.Date");

另一个问题是ORDER by date work ..该字段的类型是TimeDate，就像我记得的那样。

Answer 1

“ASU用户”和“内部加入”之间没有空格。添加空格：

StringBuilder sb = new StringBuilder();
sb.Append("SELECT u.Name,t.ThreadTitle,t.Date, t.Views,t.Replies,p.Theme,p.Topics,t.PageNumber ");
sb.Append("FROM Users AS u ");
sb.Append("INNER JOIN Threads AS t ON u.UserID=t.UserID ");
sb.Append("INNER JOIN Topics AS p ON p.TopicID=t.TopicID ");
sb.Append("WHERE u.UserID=@UserID ");
sb.Append("ORDER BY t.Date");

或者，通过调用AppendLine而不是Append来使用换行符。

更好的是，因为这只是一个长字符串，所以请使用逐字字符串：

var sql = @"
SELECT u.Name,t.ThreadTitle,t.Date, t.Views,t.Replies,p.Theme,p.Topics,t.PageNumber
FROM Users AS u
INNER JOIN Threads AS t ON u.UserID=t.UserID
INNER JOIN Topics AS p ON p.TopicID=t.TopicID
WHERE u.UserID=@UserID
ORDER BY t.Date";

Answer 2

您将所有内容附加到一行。添加空格或使用AppendLine代替附加。

Answer 3

试试这个：

StringBuilder sb = new StringBuilder();
sb.Append("SELECT u.Name,t.ThreadTitle,t.Date, t.Views,t.Replies,p.Theme,p.Topics,t.PageNumber");
sb.Append(" FROM Users AS u");
sb.Append(" INNER JOIN Threads AS t ON u.UserID=t.UserID");
sb.Append(" INNER JOIN Topics AS p ON p.TopicID=t.TopicID");
sb.Append(" WHERE u.UserID=@UserID");
sb.Append(" ORDER BY t.Date");

是的，orderby应该可以工作。

SqlException：关键字“AS”附近的语法不正确

3 个答案: