Server.Tranfer和Response.Redirect的问题 [英] Problem with Server.Tranfer and Response.Redirect

问题描述

大家好

下面是检查用户是否存在于系统中的代码的代码

Hi guys

Below is the piec of code to check if user exist in the system

if ((txtLoginID.Text == dRow["EmpEmail"].ToString()) && txtPassword.Text == dRow["EmpPassword"].ToString() && ddlvalue==cli)
            {

if ("Doctor" == dRow["EmpType"].ToString() || "Nurse" == dRow["EmpType"].ToString())
        {
Server.Transfer("~/Employee/frmEmployeeHome.aspx?EmpIDNumber=" + dRow["EmpIDNumber"].ToString());// + "&EmpFullName=" + dRow["EmpFullName"].ToString() + "&EmpIDNumber=" + dRow["EmpIDNumber"].ToString() + "&Emptype=" + dRow["Emptype"].ToString());
           found = true;
         }
           else
               if ("Admin" == dRow["EmpType"].ToString())
                    {
                                                           
             Server.Transfer("~/Administration/frmTelerikScheduling.aspx");
                                found = true;
                    }
            }

当我来到这一行时，"Server.Transfer("~/Administration/frmTelerikScheduling.aspx");"

转到该页面...下面是"frmTelerikScheduling.aspx"
中的代码

When I come to this line" Server.Transfer("~/Administration/frmTelerikScheduling.aspx");"

It goes to that page...Now below is the code from "frmTelerikScheduling.aspx"

protected void Page_Load(object sender, EventArgs e)
        {
            populateddlEmployeesOnPageLoad();
            loadDDLServices();
            loadDDlPatients();
            getAppointments();

        }

因此，我注意到我的应用程序读取了方法后便回到了登录表单

并阅读下面的代码

So i noticed after my application read the methods it goes back to the login form

and read the code below

public void loadDDlClinicName()
        {
            if (!Page.IsPostBack)
            {
                systemBusinessLayer = new BusinessLayer();

                ArrayList clinicList = new ArrayList();
                clinicList = systemBusinessLayer.getClinics();

                ddlClinicName.DataSource = clinicList;
                ddlClinicName.DataTextField = "ClinicName";
                ddlClinicName.DataValueField = "ClinicRefNumber";
                ddlClinicName.DataBind();
                ddlClinicName.Items.Insert(0, ".:Select Clinic:.");
            }
        }

然后，它在此行中抱怨一个空对象"clinicList = systemBusinessLayer.getClinics();"

方法loadDDlClinicName()在登录页面的页面加载上运行

这很奇怪...我需要帮助

Then it complains about an empty object in this line "clinicList = systemBusinessLayer.getClinics();"

method loadDDlClinicName() runs on pageload of the login page

this weird...I need help

推荐答案

，根据您所提供的描述，很明显回发正在发生.如果您使用任何身份验证或授权，则可能导致此问题.
当DDLClinic的索引更改时，还有一件事是它再次调用load函数，因此请确保正确调试它以找到操作流程.

as per description u have given it is clear that postback is taking place. If u r using any authentication or authorization then that might be causing this problem.
One more thing as u r index is changing for DDLClinic it is calling the load function again so make sure u r debugging it correctly in order to find flow of the operation.

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