zoukankan      html  css  js  c++  java
  • 重拾ASP.NET页面间传值

    1.Use Query String

    :以前总是忽略了Server.UrlEncode()  AND Server.UrlDecode() 切记,切记!

    (1)Source Page

    1 protected void QueryStringButton_Click(object sender, EventArgs e)
    2 {
    3 Response.Redirect("QueryStringPage.aspx?Data=" + Server.UrlEncode(DataToSendTextBox.Text));
    4 }

    (2)Target Page

    1  <form id="form1" runat="server">
    2 <div>
    3 <h1>Target Page - Query String</h1>
    4 The data received from the source page is: <%=Server.UrlDecode(Request.QueryString["Data"]) %><br /><br />
    5 </div>
    7 </form>

    2.Use Session

    (1)Source Page

    1  protected void SessionStateButton_Click(object sender, EventArgs e)
    2 {
    3 Session["Data"] = DataToSendTextBox.Text;
    4 Response.Redirect("SessionStatePage.aspx");
    5 }

    (2)Target page

     <div>
    <h1>Target Page - Session State</h1>
    The data received from the source page is: <%=Session["Data"] %><br /><br />
    </div>
    </form>

    3.Use HttpPost

    说明:印象中这是第一次见到这种用法,这次该记住了。

    (1)Source Page

     <asp:Button ID="HttpPostButton" runat="server" Text="Use HttpPost" 
    PostBackUrl
    ="~/HttpPostPage.aspx"/><br /><br />

    (2)Target page

    <h1>Target Page - HttpPost</h1>
    The data received from the source page is: <%=Request.Form["DataToSendTextBox"] %><br /><br />
    <fieldset>
    <legend>All form data from the sending page</legend>
    <asp:Label ID="ReceivedDataLabel" runat="server" Text="Label"></asp:Label>
    </fieldset>
    <br />
      protected void Page_Load(object sender, EventArgs e)
    {
    System.Text.StringBuilder displayValues =
    new System.Text.StringBuilder();
    System.Collections.Specialized.NameValueCollection
    postedValues = Request.Form;
    String nextKey;
    for (int i = 0; i < postedValues.AllKeys.Length; i++)
    {
    nextKey = postedValues.AllKeys[i];
    if (nextKey.Substring(0, 2) != "__")
    {
    displayValues.Append("<br>");
    displayValues.Append(nextKey);
    displayValues.Append(" = ");
    displayValues.Append(postedValues[i]);
    }
    }
    ReceivedDataLabel.Text = displayValues.ToString();

    }

    4.Use Public Properties

    (1)Source Page

     说明:这个方法也是很少用,不过在某些时候还是用得到的。

     public string DataToSend
    {
    get
    {
    return DataToSendTextBox.Text;
    }
    }

    protected void PublicPropertiesButton_Click(object sender, EventArgs e)
    {
    Server.Transfer("PublicPropertiesPage.aspx");
    }

    (2)target page

    <div>
    <h1>Target Page - Public Properties</h1>
    The data received from the source page is: <%=PreviousPage.DataToSend %><br /><br />
    <asp:hyperlink ID="Hyperlink1" runat="server" NavigateUrl="~/Default.aspx">Return to Source Page</asp:hyperlink>
    </div>

    5.Use Control Infomation

    (1)Source Page

     说明:以前只有在应用母版页时才去FindControl(),长眼见了。

    <asp:TextBox ID="DataToSendTextBox" runat="server" Text="Hello World!"></asp:TextBox><br /><br />


     protected void ControlInfoButton_Click(object sender, EventArgs e)
    {
    Server.Transfer("ControlInfoPage.aspx");
    }

    (2)Target page

    <h1>Target Page - Control Info</h1>
    The data received from the source page is:
    <asp:Label ID="DataReceivedLabel" runat="server" Text="Label"></asp:Label><br /><br />
    protected void Page_Load(object sender, EventArgs e)
    {
    var textbox = PreviousPage.FindControl("DataToSendTextbox") as TextBox;
    if (textbox != null)
    {
    DataReceivedLabel.Text = textbox.Text;
    }

    }



    反思:似乎作者没有把Cookies放到这一类来,why?


     

  • 相关阅读:
    android 多渠道打包
    第三方授权认证(一)实现第三方授权登录、分享以及获取用户资料
    Android:支持不同分辨率的屏幕设计 .
    动画效果编程基础--AnimationAndroid
    Android使用尺寸资源 dimens .
    android手机分辨率整理
    线程和进程
    js和html的结合方式
    成员变量和局部变量
    MySQL基础知识
  • 原文地址:https://www.cnblogs.com/January/p/2260775.html
Copyright © 2011-2022 走看看