索引超出了数组的范围 - 浏览器上的错误 [英] Index was outside the bounds of the array --error on browser

问题描述

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;

public partial class NewRegistration : System.Web.UI.Page
{

    public string GetConnectionString()
    {
        //sets the connection string from your web config file "ConnString" is the name of your Connection String
        return System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
    }
    

    protected void Page_Load(object sender, EventArgs e)
    {

    }

    private void ExecuteInsert(string name, string Lastname, string username, string password, string Repassword, string gender, string address,  string Email)
    {

        string sql = "INSERT INTO dance.Registration (Name, Lastname, Username, Password, Repassword, Gender,Address,Email) VALUES "   + " (@Name,@Lastname,@Username,@Password,@Repassword,@Gender,@Address,@Email)";

        try
        {
            SqlConnection conn = new SqlConnection(GetConnectionString());

            conn.Open();
            SqlCommand cmd = new SqlCommand(sql, conn);
            SqlParameter[] param = new SqlParameter[7];
            //param[0] = new SqlParameter("@id", SqlDbType.Int, 20);
            param[0] = new SqlParameter("@Name", SqlDbType.NVarChar, 50);
            param[1] = new SqlParameter("@Lastname", SqlDbType.NVarChar, 50);
            param[2] = new SqlParameter("@Username", SqlDbType.NVarChar, 50);
            param[3] = new SqlParameter("@Password", SqlDbType.NVarChar, 50);
            param[4] = new SqlParameter("@Repassword", SqlDbType.NVarChar, 50);
            param[5] = new SqlParameter("@Gender", SqlDbType.NChar, 10);
            param[6] = new SqlParameter("@Address", SqlDbType.NVarChar, 100);
            param[7] = new SqlParameter("@Email", SqlDbType.NVarChar, 50);

            param[0].Value = name;
            param[1].Value = Lastname;
            param[2].Value = username;
            param[3].Value = password;
            param[4].Value = Repassword;
            param[5].Value = gender;
            param[6].Value = address;
            param[7].Value = Email;

            for (int i = 0; i < param.Length; i++)
            {
                cmd.Parameters.Add(param[i]);
            }

            cmd.CommandType = CommandType.Text;
            cmd.ExecuteNonQuery();
            conn.Close();
        }
        catch (System.Data.SqlClient.SqlException ex)
        {
            string msg = "Insert Error:";
            msg += ex.Message;
            throw new Exception(msg);
        }
        //finally
        //{
        //    Conn.close(); 
        //}
    }

    public static void ClearControls(Control Parent)
    {

        if (Parent is TextBox)
        { (Parent as TextBox).Text = string.Empty; }
        else
        {
            foreach (Control c in Parent.Controls)
                ClearControls(c);
        }
    }
    protected void Createusrbtn_Click(object sender, ImageClickEventArgs e)
    {
        if (TxtPassword.Text == TxtRePassword.Text)
        {
            //call the method to execute insert to the database
            ExecuteInsert(TxtName.Text,
                          txtLastName.Text,
                          TxtUserName.Text,
                          TxtPassword.Text,
                          TxtRePassword.Text,
                          DropDownList1.SelectedItem.Value,
                          TxtAddress.Text,
                          txtEmailID.Text);

            
            Response.Write("Record was successfully added!");
            ClearControls(Page);
        }
        else
        {
            Response.Write("Password did not match");
            TxtPassword.Focus();
        }

    }
}

推荐答案

SqlParameter[] param = new SqlParameter[7];

您指定长度为7的 param 变量，但在尝试将8个值放入数组后。



你应该写

You assign your param variable with a length of 7, but after you try to put 8 values in the array.

You should write

SqlParameter[] param = new SqlParameter[8];

PS：下次尝试至少：

- 格式化你的代码

- 告诉您哪一行收到错误

- 提出问题

PS: next time, try at least :
- to format your code
- to tell on which row you get the error
- to ask a question

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