using SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["connectionString"].ConnectionString){con.Open();SqlCommand cmd = new SqlCommand("insert into tbl_user values(@name, @add, @date)",con);cmd.Parameters.AddWithValue("@name", TextName.Text);cmd.Parameters.AddWithValue("@add", TextAdd.Text);cmd.Parameters.AddWithValue("@date", TextDate.Text);cmd.ExecuteNonQuery();// rest of your code// ...}//This closes the using and therefore closes your connection and properly disposes of it请注意最后的注释...有关详细信息，请参阅使用Statement（C＃参考）| Microsoft Docs [ ^ ] 如果在使用参数后仍然出现错误，请检查 TextDate.Text的内容 - 你真的可以约会吗？您可能需要考虑进行一些确认它是有效日期的验证。Note the comment at the very end ... for more information see using Statement (C# Reference) | Microsoft Docs[^]If you still get an error after using Parameters then check the contents of your TextDate.Text - can you actually make a date of that. You might want to consider putting some validation in place that ensures it is a valid date. Quote：在这句话中运行Web应用程序时给出错误give me error when run web application in this Sentences 提供错误文本是个好主意，因为它告诉错误是什么。It is a good idea to give the text of error as it tells what is the error.SqlCommand cmd = new SqlCommand("insert into tbl_user values('"+TextName.Text+"','"+TextAdd.Text+"','"+TextDate.Text+"')",con); 不是你问题的解决方案，而是你遇到的另一个问题。 永远不要通过连接字符串来构建SQL查询。迟早，您将使用用户输入来执行此操作，这会打开一个名为SQL注入的漏洞，这对您的数据库很容易并且容易出错。 名称中的单引号你的程序崩溃。如果用户输入像Brian O'Conner这样的名称可能会使您的应用程序崩溃，那么这是一个SQL注入漏洞，崩溃是最少的问题，恶意用户输入，并且它被提升为具有所有凭据的SQL命令。 SQL注入 - 维基百科 [ ^ ] SQL注入 [ ^ ] 按示例进行SQL注入攻击 [ ^ ] PHP：SQL注入 - 手册 [ ^ ] SQL注入预防备忘单 - OWASP [ ^ ] 我该怎么办？解释没有技术术语的SQL注入？ - 信息安全堆栈交换 [ ^ ]Not a solution to your question, but another problem you have.Never build an SQL query by concatenating strings. Sooner or later, you will do it with user inputs, and this opens door to a vulnerability named "SQL injection", it is dangerous for your database and error prone.A single quote in a name and your program crash. If a user input a name like "Brian O'Conner" can crash your app, it is an SQL injection vulnerability, and the crash is the least of the problems, a malicious user input and it is promoted to SQL commands with all credentials.SQL injection - Wikipedia[^]SQL Injection[^]SQL Injection Attacks by Example[^]PHP: SQL Injection - Manual[^]SQL Injection Prevention Cheat Sheet - OWASP[^]How can I explain SQL injection without technical jargon? - Information Security Stack Exchange[^] 这篇关于我不知道这段代码中的错误是什么的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！
