Question

我正在尝试使用SQL Server 2005将某些值插入表中。我使用过textbox，label和listbox。但通过这样做，我有一个错误，指出“无法将参数值从ListItem转换为字符串”

我如何解决这个问题？

try
        {
            //Create an insert command
            SqlCommand insertCmd = new SqlCommand("INSERT INTO Account(CustID, Name, TelExtension, Email, Password, AccountType, Status) VALUES " + "(@StaffID, @Name, @TelExtension, @Email, @Password, @StaffType, @Status); SELECT * FROM StaffAccount", sqlCon);

        //Add the parameters to the command
        insertCmd.Parameters.Add("@CustID", SqlDbType.VarChar, 20);
        insertCmd.Parameters.Add("@Name", SqlDbType.VarChar, 50);
        insertCmd.Parameters.Add("@TelExtension", SqlDbType.NChar, 20);
        insertCmd.Parameters.Add("@Email", SqlDbType.VarChar, 50);
        insertCmd.Parameters.Add("@Password", SqlDbType.VarChar, 25);
        insertCmd.Parameters.Add("@AccountType", SqlDbType.VarChar, 2);
        insertCmd.Parameters.Add("@Status", SqlDbType.VarChar, 1);

        //Set the parameters
        insertCmd.Parameters["@CustID"].Value = StaffID_txt.Text;
        insertCmd.Parameters["@Name"].Value = Name_txt.Text;
        insertCmd.Parameters["@TelExtension"].Value = telExtension_txt.Text;
        insertCmd.Parameters["@Email"].Value = email_txt.Text;
        insertCmd.Parameters["@Password"].Value = password_txt.Text;
        insertCmd.Parameters["@AccountType"].Value = StaffType_LB.SelectedItem;
        insertCmd.Parameters["@Status"].Value = status_lblvalue.Text;

Answer 1

变化

insertCmd.Parameters["@AccountType"].Value = StaffType_LB.SelectedItem;

到

insertCmd.Parameters["@AccountType"].Value = StaffType_LB.SelectedItem.Text;

无法将参数值从ListItem转换为String

1 个答案: