We've discovered that PDF printing is broken in the recent Chrome 77.0.3865.75 update. This version of the Chrome browser does not display or print PDF documents which are displayed in an IFrame.
Affected components
ASP.NET WebForms:
- ASPxDocumentViewer
- ASPxRichEdit
- ASPxSpreadsheet
- BootstrapRichEdit
- BootstrapSpreadsheet
ASP.NET MVC Extensions:
- DocumentViewer
- RichEdit
- Spreadsheet
ASP.NET Core
- Spreadsheet
We are working on this issue, and we expect to address it soon. Please add the following tickets to your Support Center favorites to be notified of a hotfix when available:
- ASPxDocumentViewer - Print Report button not working after Google Chrome Update 76.0.3809.132
- ASP.NET Office Controls - Printing does not work in Chrome 77.0.3865.75
Solutions
If you cannot wait for a hotfix, please use the following code to resolve this issue (this code will also work for old versions of our products).
Document Viewer Solution
- Handle the client-side
Initevent in the ASPxDocumentViewer or DocumentViewer MVC Extension :
[WebForms]
<dx:ASPxDocumentViewer ID="ASPxDocumentViewer1" runat="server" ... >
<ClientSideEvents Init="onDocumetnViewerInit" />
...
</dx:ASPxDocumentViewer>[MVC]
@Html.DevExpress().DocumentViewer(settings =>(
settings.Name="MyDocumentViewer";
settings.ClientSideEvents.Init="onDocumetnViewerInit";
...
)
).GetHtml();- Implement the following JavaScript
Initfunction in the<head>or<body>or tags of your web page:
function onDocumetnViewerInit (s) {
var createFrameElement = s.viewer.printHelper.createFrameElement;
s.viewer.printHelper.createFrameElement = function (name) {
var frameElement = createFrameElement.call(this, name);
if(ASPx.Browser.Chrome) {
frameElement.addEventListener("load", function (e) {
if (frameElement.contentDocument.contentType !== "text/html")
frameElement.contentWindow.print();
});
}
return frameElement;
}
}RichEdit Solution
- Handle the client-side
Initevent, ASPxRichEdit , BootstrapRichEdit or RichEdit MVC Extension :
[WebForms]
<dx:ASPxRichEdit ID="ASPxRichEdit1" runat="server" ... >
<ClientSideEvents Init="onRichEditInit" />
...
</dx:ASPxRichEdit>[Bootstrap]
<dx:BootstrapRichEdit ID="ASPxRichEdit1" runat="server" ... >
<ClientSideEvents Init="onRichEditInit" />
...
</dx:BootstrapRichEdit>[MVC]
@Html.DevExpress().RichEdit(settings =>(
settings.Name="MyRichEdit";
settings.ClientSideEvents.Init="onRichEditInit";
...
)
).GetHtml();- Implement the following JavaScript
onRichEditInitfunction in the<head>or<body>or tags of your web page:
function onRichEditInit(s) {
if (ASPx.Browser.Chrome && ASPx.Browser.Version >= 77) {
var createHelperFrame = s.createHelperFrame;
s.createHelperFrame = function () {
var helperFrame = createHelperFrame.call(this);
helperFrame.frameElement.addEventListener("load", function () {
if (helperFrame.frameElement.contentDocument.contentType === "application/pdf")
helperFrame.frameElement.contentWindow.print();
});
return helperFrame;
}
}
}Spreadsheet Solution
- Handle the client-side
Initevent in the ASPxSpreadsheet , ASP.NET Core Spreadsheet, BootstrapSpreadsheet and Spreadsheet MVC Extension:
[WebForms]
<dx:ASPxSpreadsheet ID="ASPxSpreadsheet1" runat="server" ... >
<ClientSideEvents Init="onSpreadsheetInit" />
...
</dx:ASPxSpreadsheet>[ASP.NET Core]
@(Html.DevExpress()
.Spreadsheet("spreadsheet")
.ClientSideEvents(events => {
events.OnInit("onSpreadsheetInit");
})
...
)[Bootstrap]
<dx:BootstrapSpreadsheet ID="BootstrapSpreadsheet1" runat="server" ... >
<ClientSideEvents Init="onSpreadsheetInit" />
...
</dx:BootstrapSpreadsheet>[MVC]
@Html.DevExpress().Spreadsheet(settings =>(
settings.Name="MySpreadsheet";
settings.ClientSideEvents.Init="onSpreadsheetInit";
...
)
).GetHtml();- Implement the following JavaScript
onSpreadsheetInitfunction in the<head>or<body>or tags of your web page:
Note: we provide two workarounds for different versions of Spreadsheet. Make sure you implement an appropriate workaround in your web application.
[v18.1+]
function onSpreadsheetInit(s, e) {
if(ASPx.Browser.Chrome && ASPx.Browser.Version >= 77) {
var createSupportFrameElement = s.getRenderHelper().createSupportFrameElement;
s.getRenderHelper().createSupportFrameElement = function() {
var printFrame = createSupportFrameElement.call(this);
var printFrameElement = document.getElementById(printFrame.name);
printFrameElement.addEventListener("load", function(e) {
if(printFrameElement.contentDocument.contentType === "application/pdf")
printFrameElement.contentWindow.print();
});
return printFrame;
}
}
}[v16.2 – v17.2]
function onSpreadsheetInit(s, e) {
if(ASPx.Browser.Chrome && ASPx.Browser.Version >= 77) {
var createSupportFrameElement = s.getRenderProvider().createSupportFrameElement;
s.getRenderProvider().createSupportFrameElement = function() {
var printFrame = createSupportFrameElement.call(this);
var printFrameElement = document.getElementById(printFrame.name);
printFrameElement.addEventListener("load", function(e) {
if(printFrameElement.contentDocument.contentType === "application/pdf")
printFrameElement.contentWindow.print();
});
return printFrame;
}
}
}Please contact our support team if you need any assistance with this issue or the solutions above.