Javascript Electron.NETBlazor使用js打开新窗口_Javascript_C#_Electron_Blazor

Javascript Electron.NETBlazor使用js打开新窗口

javascript c# electron blazor

Javascript Electron.NETBlazor使用js打开新窗口,javascript,c#,electron,blazor,Javascript,C#,Electron,Blazor,我试图通过点击按钮打开新窗口 <input type="button" @onclick="CallUpdate" value="Print!" /> 在浏览器中，这项工作很好我在c#方法中调用js（问题出现在“printWindow.document.write”行（'请参见以下注释： Cannot read property 'write' of undefined TypeError: Cannot read pr

我试图通过点击按钮打开新窗口

<input type="button" @onclick="CallUpdate" value="Print!" />

在浏览器中，这项工作很好

我在c#方法中调用js（问题出现在“printWindow.document.write”行（'请参见以下注释：

Cannot read property 'write' of undefined TypeError: Cannot read property 'write' of undefined at window.updateAfterPrintJS (http://localhost:8001/myscript.js:11:26)

protected async Task CallUpdate()
    {
        try{
            await JS.InvokeVoidAsync("updateAfterPrintJS",DotNetObjectReference.Create(invokeHelper));
        }
        catch(Exception ex)
        {
            log = ex.Message;
        }
    }

window.updateAfterPrintJS = (dotnetHelper) => {
    var divContents = document.getElementById("printableArea").innerHTML;
    var printWindow = window.open('', '', 'height=200,width=400');
    printWindow.document.write('<html><head><title></title>');
    printWindow.document.write('</head><body >');
    printWindow.document.write(divContents);
    printWindow.document.write('</body></html>');
    printWindow.document.close();
    printWindow.print();
    printWindow.close();
    dotnetHelper.invokeMethodAsync('Drycleaning');
}