标签：receive pos += you values specific its bsp ||
ASP.NET postback with JavaScript
Here is a complete solution
<form id="form1" runat="server"> <asp:LinkButton ID="LinkButton1" runat="server" /> <%-- included to force __doPostBack javascript function to be rendered --%> <input type="button" id="Button45" name="Button45" onclick="javascript:__doPostBack(‘ButtonA‘,‘‘)" value="clicking this will run ButtonA.Click Event Handler" /><br /><br /> <input type="button" id="Button46" name="Button46" onclick="javascript:__doPostBack(‘ButtonB‘,‘‘)" value="clicking this will run ButtonB.Click Event Handler" /><br /><br /> <asp:Button runat="server" ID="ButtonA" ClientIDMode="Static" Text="ButtonA" /><br /><br /> <asp:Button runat="server" ID="ButtonB" ClientIDMode="Static" Text="ButtonB" /> </form>
public partial class Main : Page { protected void Page_Load(object sender, EventArgs e) { ButtonA.Click += ButtonA_Click; ButtonB.Click += ButtonB_Click; } private void ButtonA_Click(object sender, EventArgs e) { Response.Write("You ran the ButtonA click event"); } private void ButtonB_Click(object sender, EventArgs e) { Response.Write("You ran the ButtonB click event"); } }
The LinkButton is included to ensure that the __doPostBack javascript function is rendered to the client.
Simply having Button controls will not cause this __doPostBack function to be rendered.
This function will be rendered by virtue of having a variety of controls on most ASP.NET pages, so an empty link button is typically not needed
Two input controls are rendered to the client:
<input type="hidden" name="__EVENTTARGET" id="__EVENTTARGET" value="" /> <input type="hidden" name="__EVENTARGUMENT" id="__EVENTARGUMENT" value="" />
__EVENTTARGET receives argument 1 of __doPostBack__EVENTARGUMENT receives argument 2 of __doPostBackThe __doPostBack function is rendered out like this:
function __doPostBack(eventTarget, eventArgument) { if (!theForm.onsubmit || (theForm.onsubmit() != false)) { theForm.__EVENTTARGET.value = eventTarget; theForm.__EVENTARGUMENT.value = eventArgument; theForm.submit(); } }
As you can see, it assigns the values to the hidden inputs.
When the form submits / postback occurs:
javascript:__doPostBack(‘ButtonB‘,‘‘), then the button click handler for that button will be run.前台JavaScript的theForm.submit();运行后，会触发后台绑定的click事件
You can pass whatever you want as arguments to __doPostBack
You can then analyze the hidden input values and run specific code accordingly:
If Request.Form("__EVENTTARGET") = "DoSomethingElse" Then Response.Write("Do Something else") End If
ClientIDMode="Static", then you can do something like this: __doPostBack(‘<%= myclientid.UniqueID %>‘, ‘‘).__doPostBack(‘<%= MYBUTTON.UniqueID %>‘,‘‘)
ASP.NET postback with JavaScript
标签：receive pos += you values specific its bsp ||
原文地址：https://www.cnblogs.com/chucklu/p/11159222.html
