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[ASP.net教程]登陆成功后,返回登陆前的网址和删除服务器图片


登陆成功后,返回登陆前的网址

登陆前网站的cs的Page_Load方法中加入:

protected void Page_Load(object sender, EventArgs e)  {    Session.Add("url", Request.Url.ToString());  }

 

登录网站的cs登录成功后:

Response.Redirect(Session["url"].ToString());

 删除服务器图片

GridView1绑定数据库删除图片例子:

cs文件:

绑定数据库:

 

private string connStr = ConfigurationManager.ConnectionStrings["qiyesql"].ConnectionString;

 

删除服务器图片:

protected void GridView1_RowDeleting1(object sender, GridViewDeleteEventArgs e)  {    SqlConnection con = new SqlConnection(connStr);    con.Open();    SqlCommand com = new SqlCommand("select image from huandengyi where id='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'", con);    SqlDataReader dr = com.ExecuteReader();    if (dr.Read())    {      string path = HttpContext.Current.Server.MapPath("~/" + dr["image"].ToString());      if (File.Exists(path))      {        File.Delete(path);      }      else      {        Response.Write("<script>alert('图片不存在或已删除');</script>");      }    }    else    {      Response.Write("<script>alert('数据错误');</script>");    }  }

 

aspx GridView1里加入属性

 OnRowDeleting="GridView1_RowDeleting1"