我用ActiveX接口创建了一个.NET用户控件.它运作良好. 现在,我希望能够从ActiveX接口的属性包中读取和写入. 我该怎么做? 最简单的方法是使用客户端脚本将参数值传递给ActiveX html xmlns="
现在,我希望能够从ActiveX接口的属性包中读取和写入.
我该怎么做?
最简单的方法是使用客户端脚本将参数值传递给ActiveX<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
<script language="javascript">
function Rundata(file)
{
var winCtrl = document.getElementById("YourActiveX");
winCtrl.Option1 = file;
winCtrl.WriteToFile();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<object id="YourActiveX" classid="clsid:6b1bdf22-1c1d-774e-cd9d-1d1aaf7fd88f"
width="300px" height="200px">
<param name="Option1" value="valuetoRetrieve1" />
</object>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:Button runat="server" ID="Button1" OnClientClick="javascript:Rundata('valuetoRetrieve2');" />
</div>
</form>
</body>
</html>
如果您无法使用客户端脚本,则可以尝试这种方式:
假设你想要读取一个参数,例如:
<object id="YourActiveX" classid="clsid:6b1bdf22-1c1d-774e-cd9d-1d1aaf7fd88f"
width="300px" height="200px">
<param name="option1" value="valuetoRetrieve" />
</object>
您需要在项目中公开以下COM接口:
[ComImport]
[Guid("55272A00-42CB-11CE-8135-00AA004BB851")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IPropertyBag
{
void Write([InAttribute] string propName, [InAttribute] ref Object ptrVar);
void Read([InAttribute] string propName, out Object ptrVar, int errorLog);
}
[ComImport]
[Guid("37D84F60-42CB-11CE-8135-00AA004BB851")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
interface IPersistPropertyBag
{
[PreserveSig]
void InitNew();
[PreserveSig]
void Load(IPropertyBag propertyBag, int errorLog);
[PreserveSig]
void Save(IPropertyBag propertyBag, [InAttribute] bool clearDirty, [InAttribute] bool saveAllProperties);
[PreserveSig]
void GetClassID(out Guid classID);
}
您的activeX控件应该实现这些接口.您需要实现一种方法:
void IPersistPropertyBag.Load(IPropertyBag propertyBag, int errorLog)
{
object value;
propertyBag.Read("option1", out value, errorLog);
string parameter = (string)value;
}
瞧!参数应该等于“valuetoRetrieve”
