WPF - 调用 javascript 函数时出错 - 名称未知。（来自 HRESULT 的异常：0x80020006 (DISP_E_UNKNOWNNAME)）
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WPF - Error while calling javascript function - Unknown name. (Exception from HRESULT: 0x80020006 (DISP_E_UNKNOWNNAME))
提问by Mahesh
I am using "WebBroswer" in my wpf application to render Google map. So I am calling Pan(x, y) JavaScript method with some parameters form my c# code.
我在 wpf 应用程序中使用“WebBroswer”来呈现 Google 地图。所以我正在调用 Pan(x, y) JavaScript 方法，其中包含一些来自我的 c# 代码的参数。
But I am getting this below error.
但我收到以下错误。
Unknown name. (Exception from HRESULT: 0x80020006 (DISP_E_UNKNOWNNAME))
未知名称。（来自 HRESULT 的异常：0x80020006 (DISP_E_UNKNOWNNAME)）
My Window2.xaml File:
我的 Window2.xaml 文件：
<Window x:Class="Test.Window2"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window2" Height="300" Width="300">
<Grid>
<WebBrowser Name="mapBrowser" Margin="50" />
<Button Name="button1" VerticalAlignment="Bottom" Click="button1_Click">Button</Button>
</Grid>
</Window>
My Window2.xaml.cs File:
我的 Window2.xaml.cs 文件：
namespace Test
{
/// <summary>
/// Interaction logic for Window2.xaml
/// </summary>
public partial class Window2 : Window
{
public Window2()
{
InitializeComponent();
}
private void button1_Click(object sender, RoutedEventArgs e)
{
Uri uri = new Uri(@"pack://application:,,,/HTMLPage1.htm");
Stream source = Application.GetContentStream(uri).Stream;
mapBrowser.NavigateToStream(source);
this.mapBrowser.InvokeScript("Pan", x, y);
}
}
}
My HTML Page:
我的 HTML 页面：
<html>
<head>
<title></title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var map;
var latlng;
var lat;
var lng;
var zoom;
function Init() {
lat = 40.632915;
lng = -8.68929;
zoom = 18
latlng = new google.maps.LatLng(lat, lng);
var options = {
zoom: 18,
center: latlng,
mapTypeId: google.maps.MapTypeId.SATELLITE
};
map = new google.maps.Map(document.getElementById("map_canvas"), options);
}
function Pan(x, y) {
try {
lat = x;
lng = y;
map.panTo(new google.maps.LatLng(lat, lng));
}
catch (ex) {
window.alert("Pan:Error");
}
}
</script>
</head>
<body onload="Init()">
<div id="map_canvas" style="width: 100%; height: 100%">
</div>
</body>
</html>
采纳答案by Mahesh
Yes, I got the problem. I try to call the JavaScript function without loading the HTML page. So I have first loaded the html page and then called the JavaScript function and its working for me.
是的，我遇到了问题。我尝试在不加载 HTML 页面的情况下调用 JavaScript 函数。所以我首先加载了 html 页面，然后调用了 JavaScript 函数，它对我有用。
So I have changed my code as below and it is working fine :-
所以我已经改变了我的代码如下，它工作正常：-
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for Window1.xaml
/// </summary>
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
Uri uri = new Uri(@"pack://application:,,,/HTMLPage1.htm");
Stream source = Application.GetContentStream(uri).Stream;
mapBrowser.NavigateToStream(source);
}
private void button1_Click(object sender, RoutedEventArgs e)
{
try
{
this.mapBrowser.InvokeScript("Pan", 19.006145, 72.818148);
}
catch
{
}
}
}
}
回答by Joe
It's better to move the JavaScript invoke to Document loaded event.
最好将 JavaScript 调用移动到文档加载事件。
