简单更新查询导致 System.ComponentModel.Win32Exception: The wait operation timed out error in C# 和 SQL 服务器

Question

我正在尝试创建一个忘记密码页面，用于验证用户的用户名 email、安全问题和答案，然后再将其发送到新密码页面。 下面的代码是将用户重定向到新密码页面的 onClick。

protected void SubmitButton_Click(object sender, EventArgs e)
{
        string email = Email.Text;
        string user = UserName.Text;
        string question = Question.Text;
        string answer = Answer.Text;

        string strCon = ConfigurationManager.ConnectionStrings["WebConfigConString"].ConnectionString;

        SqlConnection con = new SqlConnection(strCon);
        con.Open();

        string strCheck = "SELECT * FROM ACCOUNT WHERE ID = @id AND EMAIL = @email AND SECURITYQUESTION = @question AND SECURITYANSWER = @answer";
        SqlCommand cmdCheck = new SqlCommand(strCheck, con);

        cmdCheck.Parameters.AddWithValue("@id", user);
        cmdCheck.Parameters.AddWithValue("@question", question);
        cmdCheck.Parameters.AddWithValue("@email", email);
        cmdCheck.Parameters.AddWithValue("@answer", answer);

        SqlDataReader dtrCheck = cmdCheck.ExecuteReader();

        if (dtrCheck.HasRows)
        {
            Response.Redirect("newPassword.aspx?id=" + user);
        } 
        else
        {
            ErrorMsg.Text = "Invalid username or email / question and answer does not match!";
        }
}

下面这段代码是newPassword的aspx页面的表单段。

<form runat="server">
     <div class="form-group">
         <asp:Label ID="PasswordLabel" runat="server" AssociatedControlID="Password">
         Password:</asp:Label>

         <asp:TextBox class="form-control form-control-user" ID="Password" runat="server" TextMode="Password"></asp:TextBox>
         <asp:RequiredFieldValidator ID="PasswordRequired" runat="server" ControlToValidate="Password"
              ErrorMessage="Password is required." ForeColor="Red">*</asp:RequiredFieldValidator>
     </div>
     <div class="form-group">
         <asp:Label ID="ConfirmPasswordLabel" runat="server" AssociatedControlID="ConfirmPassword">
                    Confirm Password:</asp:Label>
         <asp:TextBox class="form-control form-control-user" ID="ConfirmPassword" runat="server" TextMode="Password"></asp:TextBox>
         <asp:RequiredFieldValidator ID="ConfirmPasswordRequired" runat="server" ControlToValidate="ConfirmPassword"
              ErrorMessage="Confirm Password is required." ForeColor="Red">*</asp:RequiredFieldValidator>
         <asp:CompareValidator ID="PasswordCompare" runat="server" ControlToCompare="Password"
                                            ControlToValidate="ConfirmPassword" ErrorMessage="The Password and Confirmation Password must match." ForeColor="Red">*</asp:CompareValidator>
     </div>

     <asp:ValidationSummary ID="ValidationSummary1" runat="server" ForeColor="Red" />
     <asp:Button ID="SubmitButton" runat="server" Text="Confirm" class="btn btn-primary btn-user btn-block" OnClick="SubmitButton_Click"/>
 </form>

这是新密码的 onclick onclick后面的代码：

protected void SubmitButton_Click(object sender, EventArgs e)
{
        string id = Request.QueryString["id"];
        string password = Password.Text;

        string strCon = ConfigurationManager.ConnectionStrings["WebConfigConString"].ConnectionString;

        using (SqlConnection con = new SqlConnection(strCon))
        {
            con.Open();

            string strChange = "UPDATE ACCOUNT SET PASSWORD = @password WHERE ID = @id";

            SqlCommand cmdChange = new SqlCommand(strChange, con);

            cmdChange.Parameters.AddWithValue("@id", id);
            cmdChange.Parameters.AddWithValue("@password", password);

            cmdChange.ExecuteNonQuery();

            con.Close();

            Response.Redirect("login.aspx?msg=Password updated successfully!");
        }
}

但是，每当我在填写新密码后单击提交时，它会冻结很长时间然后显示此错误：

System.ComponentModel.Win32Exception：等待操作超时错误

Answer 1

显然，我忘记在将用户重定向到 newPassword.aspx 之前关闭连接，只需在重定向对我有用之前添加一个 con.Close() 即可。