ASP.net：从ajax javascript调用webmethod。 [vb.net]
[英]ASP.net: Calling a webmethod from ajax javascript. [vb.net]
问题描述
I'm creating dynamically a Popup-Extender with some controls. 
我正在动态创建带有某些控件的Popup-Extender。 One control is a Button which has the "onclick" attribute and has to call the JavaScript method submit. 一个控件是Button，它具有“ onclick”属性，并且必须调用JavaScript方法Submit。 I'm creating the Popup-Extender and it's controls in "SiteMaster.vb". 我正在创建Popup-Extender，它是“ SiteMaster.vb”中的控件。 the attribute "onclick" of the button is set in the "click-Event" of the Button which calls the "modalpopup.show" Method. 按钮的属性“ onclick”在按钮的“ click-Event”中设置，该按钮调用“ modalpopup.show”方法。 The created html-Code which i can see with the developer-tool from my Browser is: 我可以通过浏览器的开发人员工具看到的创建的html代码为：
<input type="submit" name="ctl00$button_buttontestfooter_50_0_0" value="test" onclick="submit();" id="button_buttontestfooter_50_0_0" runat="server">
In my opinion everything looks fine until now. 在我看来，到目前为止一切都还不错。 I have written the JavaScript Method "submit" in the Source of Site.Master: 我已经在Site.Master的源代码中编写了JavaScript方法“提交”：
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<link href="~/Styles/Site.css" rel="stylesheet" type="text/css" />
<asp:ContentPlaceHolder ID="HeadContent" runat="server">
</asp:ContentPlaceHolder>
<script type="text/javascript">
function submit() {
alert("blaaaaa");
console.log("jijijij");
window.open("http://www.google.de");
var dataValue = "{'name': 'Niklas'}";
$.ajax({
type: 'POST',
url: "http://localhost:53470/GetCurrentTime",
data: dataValue,
contentType: 'application/json',
dataType:'json',
error: function (a, b, c) {
console.log("jijijij")
alert(a + ":" + b + "::::" + c);
},
success: function (data) {
console.log("hallo");
alert("" + data);
}
});
}
</script>
</head>
At Default.aspx.vb i have written the webmethod: 在Default.aspx.vb，我编写了web方法：
Public Class _Default
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
End Sub
<System.Web.Services.WebMethod()>
Public Shared Function GetCurrentTime(ByVal name As String) As String
Return name
End Function
But I have the feeling that JavaScript method is never called because I cannot see that in the logs in browser console as I have put console.log() Method in JavaScript function which is being called. 但是我感觉从来没有调用JavaScript方法，因为我没有在浏览器控制台的日志中看到它，因为我将console.log（）方法放在了要调用的JavaScript函数中。
3 个解决方案
解决方案1
0 2017-02-02 11:50:55
The input type you have used is submit , so once you click this button it won't call javascript function, and will directly submit the form. 您使用的输入类型是submit ，因此，一旦单击此按钮，它将不会调用javascript函数，而将直接提交表单。 So instead of this please change use type="button" to call JavaScript function 因此，请代替使用type="button"来调用JavaScript函数
解决方案2
0 2017-02-02 12:17:01
Private Sub ButtonClick(sender As Object, e As EventArgs)
Dim LayoutDef As ASPGlobalHandling.LayoutDefinition = p.Layout_Load("sessionitem_layouts", 0, "footer", "", False)
ctrl.Container_LoadControls(updPnlContent.ContentTemplateContainer, 0, LayoutDef.Layout, "", 0)
Dim c3po As Control = p.Container_FindControl(updPnlContent, "button_buttontestfooter_50_0_0")
If TypeOf (c3po) Is Button Then
Beep()
Dim c3po1 As Button = CType(c3po, Button)
c3po1.Text = "test"
c3po1.Attributes.Add("OnClientClick", "submit();")
End If
modalPopUp.Show()
End Sub
This is the button event where i call modalpopup.show. 这是我称为modalpopup.show的按钮事件。 in the method load Container_LoadControls the button is generating. 在方法load Container_LoadControls中，按钮正在生成。 later i add the attribute onklick 稍后我添加属性onklick
解决方案3
0 2017-02-02 15:46:14
I just saw that the Javascript-Method "submit" can be called from the buttons which are not created in the ButtonClick()-Event. 我只是看到可以从不在ButtonClick（）-Event中创建的按钮调用Javascript-Method“ submit”。 Someone has a solution? 有人有解决方案吗？
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.