首页 > 解决方案 > 通过javascript设置输入的值

问题描述

我正在尝试做的是通过 javascript 更改代码背后的 C# veriable 的值。我的代码:

HTML & JS -

function SetPostbackValues() {
    document.getElementById("hiddenControl").value = "Employer";
}
function SetPostbackValues2() {
    document.getElementById("hiddenControl").value = "Employee";
}
<!-- it's all inaide a form tag  -->
<div id="left">
  <div id="background" style="background: url(paper.gif); background-size: cover;" onclick="chg();SetPostbackValues();"><img id="man" style="right:16px;" src="https://www.watertankfactory.com.au/wp-content/uploads/2015/08/Smiling-young-casual-man-2.png" />    <div id="desc">employer</div>
  </div>
    <div id="trying"></div>
  </div>
  <div id="right">
    <div id="background2" style="background: url(paper.gif); background-size: cover;" onclick="chg();SetPostbackValues2();"><img id="man2" style="right:16px;" src="https://www.watertankfactory.com.au/wp-content/uploads/2015/08/Smiling-young-casual-man-2.png" /><div id="desc2">employee</div>
  </div>
</div>
    <input id="hiddenControl" type="hidden" runat="server" />

C# -

protected void RegisterUser()
        {
        //this will run when the client presses on the 'register' button
        ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('Record Inserted Successfully')", true);
        u.Email = Email.Text;
        u.Password = Password.Text;
        u.Firstname = Firstname.Text;
        u.Lastname = Lastname.Text;
        u.Gender = Gender.SelectedItem.Text;
        //relevant bit:
        u.Type = hiddenControl.Value;
        u.Birthday = Birthday.SelectedDate.ToString("dd/MM/yyyy");
        u.Country = Country.Text;
        u.City = City.Text;
        u.Address = Address.Text;

        if (Pfp.HasFile)
        {
            string path = Server.MapPath("pics/");
            Pfp.SaveAs(path + Pfp.FileName);
            u.Pfp = Pfp.FileName;
        }
        s.AddClient(u);
    }

因此,当客户第一次进入该站点时,他们将按下其中一个backgroundbackground2哪个应该为隐藏输入设置一个值,该隐藏输入将用于代码后面的注册功能。当我设置断点时,我看到该值始终只是一个空字符串 -""在我所有的迭代中(尝试To.String()在 C# 中设置它,并在 javascript 中删除值周围的“”,但没有任何效果)。我不明白为什么它不会设置一个值......

谢谢你的帮助!

标签: javascriptc#htmlcode-behind

解决方案


也许你的错误在 chg() 函数中,检查一下。
另一方面,您必须将“”添加到如下值:

function SetPostbackValues() {
    document.getElementById("hiddenControl").value = "Employer";
}
function SetPostbackValues2() {
    document.getElementById("hiddenControl").value = "Employee";
} 

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