AJAX更新面板是否会影响C#代码?

时间:2012-08-01 18:56:08

标签: c# asp.net ajax visual-studio-2010 updatepanel

我问的原因是因为我有一个填充了文本框,标签等的更新面板,我根据用户点击的内容使其可见/不可见。后来,我运行一个循环来清除所有文本框。它曾经工作得很好,但现在我已经添加了AJAX更新面板,它给了我一个“无效的回发或回调参数”错误。

这是因为AJAX更新面板吗?或者我自己做错了什么?

谢谢, 埃利

[编辑]: 好的,我正在添加一大堆代码,因为我不知道它来自哪里:

这是写记录的方法:

protected void AddEmployerRecord()
    {
        connection = new SqlConnection();
        connection.ConnectionString = "****";
        connection.Open();

        newEmployer = new EmployerCRUD(connection);

        employerRow.employerName = tb_employer.Text;
        employerRow.empPhone = tb_phone.Text;
        employerRow.empFax = tb_fax.Text;
        employerRow.empEmail = tb_email.Text;
        employerRow.empAddress = tb_address.Text;
        employerRow.empCity = tb_city.Text;
        employerRow.empState = ddl_state.SelectedValue.ToString();
        employerRow.empZIP = tb_ZIP.Text;
        employerRow.startDate = Convert.ToDateTime(tb_fromDate.Text);
        employerRow.endDate = Convert.ToDateTime(tb_toDate.Text);
        employerRow.startPay = Convert.ToDecimal(tb_startPay.Text);
        employerRow.endPay = Convert.ToDecimal(tb_endPay.Text);
        employerRow.leaveReason = tb_leaveReason.Text;
        employerRow.supervisorFName = tb_superFName.Text;
        employerRow.supervisorLName = tb_superLName.Text;
        employerRow.contactForRef = rbl_contact.SelectedValue.ToString();
        employerRow.jobDesc = tb_jobDesc.Text;
        employerRow.applicantID = 10010;
        //employerRow.applicantID = Convert.ToInt32(Session["ApplicantNum"]);
        employerRow.supervisorTitle = tb_superTitle.Text;
        employerRow.jobTitle = tb_jobTitle.Text;
        employerRow.startPayType = ddl_startPayType.SelectedValue.ToString();
        employerRow.endPayType = ddl_endPayType.SelectedValue.ToString();

        ct_emp = newEmployer.Add(employerRow);
        // *************** Error Message *************** //
        //if (ct_emp.Message != "OK")
        //    Error message
        //else
        //    

        connection.Close();
    }

这是加载网格的方法:

protected void LoadGrid()
    {
        try
        {
            SqlConnection pConnection = new SqlConnection();
            pConnection.ConnectionString = "**";
            pConnection.Open();
            string sqlstatement = "SELECT EmployerID, EmployerName FROM dbo.EMPLOYER WHERE ApplicantID = @applicantID";
            command = new SqlCommand(sqlstatement, pConnection);
            command.Parameters.AddWithValue("@applicantID", 10010);
            //command.Parameters.AddWithValue("@applicantID", Session["ApplicantNum"].ToString().Trim());
            ds = new DataSet();
            adapter = new SqlDataAdapter(command);
            builder = new SqlCommandBuilder(adapter);
            adapter.Fill(ds);
            gv_employers.DataSource = ds.Tables[0];
            gv_employers.DataBind();
            pConnection.Close();
        }
        catch (Exception error)
        {
            Response.Write(error.Message);
        }
    }

正如旁注,申请人在调试时需要10010(需要一致性)。

此外,我在某处读到当您尝试将数据重新绑定到网格时出现此问题。每次重新加载页面时都会运行LoadGrid()方法。我应该将数据绑定到其他地方吗?如果是这样,怎么样?

2 个答案:

答案 0 :(得分:0)

如果您想要一种简单的方法来清除所有文本框,请使用类似这样的内容

    public  void ClearTextItems(ControlCollection controls)
    {
        foreach (Control c in controls)
        {
            if (c is System.Web.UI.WebControls.TextBox)
            {
                TextBox t = c as TextBox;
                t.Text = string.Empty;
            }
        }
     }

需要查看其他代码,您将收到PostBack错误...

答案 1 :(得分:0)

添加UpdatePanel不应该导致该错误。

UpdatePanels封装了页面的一部分,并导致部分刷新到该部分。

您是否正在更新控件集合?根据某些用户输入动态添加控件或用户控件?

检查ViewState的添加内容或控件上的控件集合。