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The author:(作者)归海一刀
published in(发表于) 2014/1/30 0:58:15
Asp.Net+Ajax，用户名检测_[Asp.Net教程]

Asp.Net+Ajax 用户名检测_[Asp.Net教程]

















AJAX用户名检测




前台的JS代码：


前台的控件：


查询页checkusername.aspx的后台代码：
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;




public partial class checkusername : System.Web.UI.Page
{
private string sConnectionString = ConfigurationManager.ConnectionStrings["WebConnString"].ToString();
protected void Page_Load(object sender, EventArgs e)
{
string sUserName = Request.QueryString["username"].Trim().ToString();
using (SqlConnection conn = new SqlConnection(sConnectionString))
{
conn.Open();
using (SqlCommand cmd = new SqlCommand("SELECT COUNT(*) FROM tbWebManage WHERE UserName=@UserName", conn))
{
cmd.Parameters.AddWithValue("@UserName", sUserName);
string sResult = Convert.ToString(cmd.ExecuteScalar());
Response.Clear();
if (sResult == "0")
{
Response.Write("1");
}
else
{
Response.Write("0");
}
Response.End();
}
}
}




}

来源:cnblogs






















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