C# 根据数据集验证电子邮件和密码输入
我试图根据数据库中数据集的结果验证表单中的用户输入。我不知道我是在实现这个逻辑，还是在尝试foreach循环，我只是根据逻辑编出来的。我试图将数据集之外创建的DataTable的索引分配给变量，然后检查它们是否匹配用户输入。这是一种体面的方式吗？可能吗？我怎样才能做到这一点 我从我认为正确实现的代码中得到了一个错误，您可以在代码的注释中找到 受保护的无效btnSubmit\u Clickobject发件人，事件参数e { //为数据集创建连接，以填写电子邮件和密码进行验证 string ConnectionString=ConfigurationManager.ConnectionString[ContourCoffeeRoastersConnectionString].ConnectionString； SqlConnection Conn=新的SqlConnectionConnectionString； 康涅狄格开放大学C# 根据数据集验证电子邮件和密码输入,c#,asp.net,validation,datatable,dataset,C#,Asp.net,Validation,Datatable,Dataset,我试图根据数据库中数据集的结果验证表单中的用户输入。我不知道我是在实现这个逻辑，还是在尝试foreach循环，我只是根据逻辑编出来的。我试图将数据集之外创建的DataTable的索引分配给变量，然后检查它们是否匹配用户输入。这是一种体面的方式吗？可能吗？我怎样才能做到这一点 我从我认为正确实现的代码中得到了一个错误，您可以在代码的注释中找到 受保护的无效btnSubmit\u Clickobject发件人，事件参数e { //为数据集创建连接，以填写电子邮件和密码进行验证 string Conn
//creats a data set with database information and puts the dataset in a datatable
SqlDataAdapter daCustomer = new SqlDataAdapter("Select (CustEmail, CustPW) From Customer", Conn);
DataSet dsEmailsandPW = new DataSet("Emails");
daCustomer.Fill(dsEmailsandPW, "Customers");//I get and error here in my stack trace
DataTable tblCustomers;
tblCustomers = dsEmailsandPW.Tables["Customers"];
//sets the variable to user inputed data from the login form so it can be compared and validated to the dataset
string custEmail = exampleInputEmail1.Text;
string custPW = exampleInputPassword1.Text;
//looks through each row on the data set to see if a matching email can be found
foreach (DataRow drCurrent in tblCustomers.Rows)
{
string txtEmail = drCurrent[0].ToString();//sets a variable to the first index of the current row of the dataset
if (txtEmail == custEmail)//if a match is found with the user input and a record in the database through the data set the password is then checked for validation
{
string txtPW = drCurrent[1].ToString();//assigns a vaiable to the second index of the row that should contain customer password
if (txtPW == custPW)//if the password is a match
{
lblLogin.Text = "You are logged in!";
//TODO: query for cartID and set it to the cookie!!!!!
}
else
{
lblLogin.Text = "Email/username combination is not correct";
}
}
else
{
lblLogin.Text = "Email/username combination is not correct";
}
}
我建议发送一个查询
"SELECT CustEmail FROM Customer where CustPW =" + custPw;
"SELECT CustEmail FROM Customer where CustPW =" + sha1(custPw);