如何从asp.net中的上一页到下一页获取隐藏字段值 [英] How to get hiddenfield value from previous page to next page in asp.net

问题描述

大家好，

我正在开发一个Web应用程序，我需要在隐藏字段中存储一些值，我需要在其他页面中访问此值。我需要发布大量数据，所以我更喜欢使用HiddenField而不是Session或QueryString。我使用以下代码。



Default1.aspx

Hi all,
I am developing a web application in which i need to store a some values in a hiddenfield and i need to access this values in other pages. I need to post huge data and so i prefer using HiddenField than Session or QueryString. I am using the following code.

Default1.aspx

<asp:HiddenField ID="hdnEmailID" runat="server" />

Default1.aspx.cs

Default1.aspx.cs

protected void LinkGroupSummary_Click(object sender, EventArgs e)
        {            
            hdnEmailID.Value = this.EmailList;
            Server.Transfer("Default2.aspx");

        }

Default2.aspx.cs

Default2.aspx.cs

if (Page.PreviousPage != null)
                    {
                        HiddenField MyHiddenValue = (HiddenField)Page.PreviousPage.FindControl("hdnEmailID");
                        if (MyHiddenValue != null)
                        {
                            string email = MyHiddenValue.Value;
                        }
                    }

在Default.aspx.cs页面中，我总是将MyHiddenField作为null。



请帮忙。



提前致谢，

Sruthi R

In the Default.aspx.cs page, i am getting MyHiddenField as null always.

Please help.

Thanks in advance,
Sruthi R

推荐答案

如何：在ASP之间传递值。 NET网页 [ ^ ]应该是你完成的完美链接。看看_VIEWSTATE_在发布数据时如何自动传递隐藏字段。

How to: Pass Values Between ASP.NET Web Pages[^] should be the perfect link for you to go through. Have a look at how _VIEWSTATE_ automatically passes hidden fields when posting data.

点击这里

http://codingboys.blogspot.in/2012/11/how-to-get-previous-page-value-in -aspnet.html [ ^ ]

Hello freinds,
//use this code

suppose i have 2 page. A.aspx and B.aspx
I have pass value of page a to page b using hidden field
//take hiddenfield on page, one button with hidden property and write one script

<script type="text/javascript">
        function load(id) {
            document.getElementById('<%=HiddenField1.ClientID%>').value = id;
            document.getElementById("<%= ButtonHide.ClientID %>").click();
        }
        </script>



<asp:HiddenField ID="HiddenField2" runat="server" />;
<asp:Button ID="ButtonHide" runat="server" Text="Button" style="display:none;"

                           formnovalidate="true"     onclick="ButtonHide_Click"/>

//in code file of page a
 protected void ButtonHide_Click(object sender, EventArgs e)
    {
        Response.Redirect("PriceDetail.aspx?id="+HiddenField1.Value+"");
    }

now in page b code file

int id = Convert.ToInt32(Request.Params["id"]);
and u get value of hiddenfield

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