从 sql 数据库中检索数据后,我可以在我的文本框、下拉列表中显示我的数据,但是当我继续使用更新按钮时,在文本框或下拉列表中编辑的信息不会更新到数据库中。我试图在页面加载中删除代码,并手动重新键入所有数据,它可以更新。我想要的只是从数据库中检索数据并将其显示在文本框中,并且可以在从文本框中进行一些更改后将其更新到数据库中。有人可以帮我吗?谢谢。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
public partial class UpdateCustomerDetails : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection con1 = new SqlConnection("Data Source=USER-PC;Initial Catalog=webservice_database;Integrated Security=True");
DataTable dt = new DataTable();
con1.Open();
SqlDataReader myReader = null;
SqlCommand myCommand = new SqlCommand("select * from customer_registration where username='" + Session["username"] + "'", con1);
myReader = myCommand.ExecuteReader();
while (myReader.Read())
{
TextBoxPassword.Text = (myReader["password"].ToString());
TextBoxRPassword.Text = (myReader["retypepassword"].ToString());
DropDownListGender.SelectedItem.Text = (myReader["gender"].ToString());
DropDownListMonth.Text = (myReader["birth"].ToString());
DropDownListYear.Text = (myReader["birth"].ToString());
TextBoxAddress.Text = (myReader["address"].ToString());
TextBoxCity.Text = (myReader["city"].ToString());
DropDownListCountry.SelectedItem.Text = (myReader["country"].ToString());
TextBoxPostcode.Text = (myReader["postcode"].ToString());
TextBoxEmail.Text = (myReader["email"].ToString());
TextBoxCarno.Text = (myReader["carno"].ToString());
}
con1.Close();
}
protected void Button1_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("Data Source=USER-PC;Initial Catalog=webservice_database;Integrated Security=True");
SqlCommand cmd = new SqlCommand("UPDATE customer_registration SET password = @password, retypepassword = @retypepassword, gender = @gender, birth = @birth, address = @address, city = @city, country = @country, postcode = @postcode, email = @email, carno = @carno where username='" + Session["username"] + "'", con);
con.Open();
cmd.Parameters.AddWithValue("@password", TextBoxPassword.Text);
cmd.Parameters.AddWithValue("@retypepassword", TextBoxRPassword.Text);
cmd.Parameters.AddWithValue("@gender", DropDownListGender.Text);
cmd.Parameters.AddWithValue("@birth", DropDownListDay.Text + DropDownListMonth.Text + DropDownListYear.Text);
cmd.Parameters.AddWithValue("@address", TextBoxAddress.Text);
cmd.Parameters.AddWithValue("@city", TextBoxCity.Text);
cmd.Parameters.AddWithValue("@country", DropDownListCountry.Text);
cmd.Parameters.AddWithValue("@postcode", TextBoxPostcode.Text);
cmd.Parameters.AddWithValue("@email", TextBoxEmail.Text);
cmd.Parameters.AddWithValue("@carno", TextBoxCarno.Text);
cmd.ExecuteNonQuery();
con.Close();
if (IsPostBack)
{
Response.Redirect("UpdateSuccess.aspx");
}
}