I am getting below error when processing the single page pdf.
May i know why i am getting this error
Doc theSrc = new Doc();
theSrc.Read(e.FullPath); on this line
Unable to find object at PDF cross-reference stream location.
Thanks,
If you use ABCpdf's ExtraChecks feature that would give you the option to either try and get ABCpdf to fix the corruption, or have your own application/site issue a warning that the PDF is corrupt.
Of course there are limits to what ABCpdf can fix - in that case you would still end receiving an error from ABCpdf.
In terms of code, the logic would be something like this:
try
{
doc.Read(inFile);
// No corruption detected
doc.Save("good.pdf");
}
catch
{
try
{
doc.Read(inFile, new XReadOptions { ExtraChecks = true });
// ExtraChecks managed to fix the corruption
doc.Save("fixed.pdf"));
}
catch
{
// ABCpdf could not fix the corruption
}
}
Related
For some reason, saving a png back out from qml directly doesn't work. I have a qml UI on top of a Golang application. When I do
source.grabToImage(function(result){
console.log("image: ", result.url)
if (!result.saveToFile(urlNoProtocol)){
console.error('Unknown error saving to',urlNoProtocol);
} else {
console.log("saved to " + urlNoProtocol)
}
I get an error saving out. The location to save the file is coming from a fileDialog and I preprocess it to remove the file:// which I understand needs to be removed before using saveToFile. However I get an unknown error saving from the above code.
I suspect this is something to do with the qml being embedded in the binary application (perhaps to do with qrc:// or something)
Anyway my current plan is to send the image to the golang backend and save it out from there, so my question is, how from grabToImage or saveToFile can I get the image bytes that I will then save?
N.B Using therecipe/qt for the interface between Golang and qml
I have used this method for grabbing screen shots..
function performScreenShot(item, name) {
if(typeof(item) === "undefined") {
return;
}
else if(typeof(name) !== "string") {
name = "screenshot.png"
}
item.grabToImage(function(result) {
result.saveToFile(name);
});
}
Usage example:-
performScreenShot(main, "screenshot-" + screenShotIndex + ".png")
Where main is my object id and screenShotIndex is something im incrementing so as not to override any previous capture.
Ensure that you have write permission on the device.
We're using PushStreamContent to stream some large lumps with Content-Disposition headers set and the like. As a number of people have discovered, the drawback is what happens when something goes wrong in the streaming?
At the very least, we were trying to get the error logged on our side so someone could follow up.
Recently, I ran into a weird situation. Putting a try/catch around the streaming function worked well enough for errors encountered before you actually started streaming (i.e. errors in sql queries and the like), but if the error occurred later (like in the serialization), the catch block doesn't fire.
Would anyone have any idea why that is?
e.g.
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
try
{
response.Content = new PushStreamContent((stream, content, context) =>
{
using (XmlWriter rWriter = PrepForXmlOutput(stream))
{
rpt.GenerateXmlReport(rWriter, reportParams, true);
}
}, "EventReport", extension);
}
catch (Exception e)
{
// The first step of GenerateXmlReport() is to run the sql;
// if the error happens there, this fires and will log the exception
// if the error happens later, during the result serialization, this does NOT fire
Log.Error(e);
}
return response;
Hate it when I see the answer just after I hit Post.
Try/catch around the outside only covers until I return the HttpResponseMessage. When/where I get the exception depends on how far the inner method gets before that return happens.
The try/catch needed to be on the inner call (the one where all the work happens) to cover the whole lifecycle.
I would like to get an alert when errors occur when loading my jqGrid table. For instance, when the jsonReader is not well configured, like when repeatitems is true instead of false, U can see in Firebug the error:
ccur is undefined
[Break On This Error] idr = ccur[idn] || idr;
How can I place such an error in an alert? I have already tried using loadError, but it doesn't work, because it is not even triggered.
It seems for me that you should just use try - catch block over jqGrid code:
try {
// create the grid
$("#list").jqGrid({
// all jqGrid options
});
} catch (err) {
// display the error message which you want
alert(err);
}
UPDATED: You are right, the try {...} catch (err) {...} which I described before work in IE only with reading local data. In case of getting data from the server the exception take place inside of success callback of $.ajax. To be exactly it take place inside of addJSONData or addXmlData depend of the type of data which you use. To catch the exception you should modify code of jqGrid in the place. The modified code can be about the following
success:function(data,st, xhr) {
if ($.isFunction(ts.p.beforeProcessing)) {
ts.p.beforeProcessing.call(ts, data, st, xhr);
}
try {
if(dt === "xml") { addXmlData(data,ts.grid.bDiv,rcnt,npage>1,adjust); }
else { addJSONData(data,ts.grid.bDiv,rcnt,npage>1,adjust); }
if(lc) { lc.call(ts,data); }
if (pvis) { ts.grid.populateVisible(); }
} catch (err) {
alert(err);
}
if( ts.p.loadonce || ts.p.treeGrid) {ts.p.datatype = "local";}
data=null;
if (npage === 1) { endReq(); }
}
I tested in the demo the corresponding modified version of jquery.jqGrid.src.js which display error message. I don't reproduced exactly the error which you described so the error message is a little other as in your case.
If you need minimized version of the modified jquery.jqGrid.src.js file you can produce it yourself with any JavaScript minimizer. For example Microsoft Ajax Minifier can be free downloaded and installed. The usage as
ajaxmin.exe jquery.jqGrid.src.js -out jquery.jqGrid.min.js
will produce the new minimized version of jquery.jqGrid.src.js which will be even a little smaller as the original jquery.jqGrid.min.js.
Another good minimizer is available online here. You should use "Simple" Optimization only.
I try to reload a Web page using (JavaXPCOM):
nsIWebBrowser webBrowser = (nsIWebBrowser) browser
.getWebBrowser();
nsIWebNavigation webNavigation = (nsIWebNavigation) webBrowser.queryInterface(nsIWebNavigation.NS_IWEBNAVIGATION_IID);
try {
nsISHistory sessionHistory = webNavigation.getSessionHistory();
if (sessionHistory != null) {
webNavigation = (nsIWebNavigation) sessionHistory.queryInterface(nsIWebNavigation.NS_IWEBNAVIGATION_IID);
}
} catch (XPCOMException e) {
}
webNavigation.reload(nsIWebNavigation.LOAD_FLAGS_NONE);
But reload doesn't happen at all. I tried force it by using the following flags, but page doesn't refresh as well:
nsIWebNavigation.LOAD_FLAGS_BYPASS_PROXY|nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE
Anyone knows what can be the reason for that?
Thanks!
Did you try checking Error Console for syntax errors? You seem to be trying to use C++ type casts in JavaScript. That cannot work. Assuming that browser is a <browser> element, this should work:
browser.reload();
Or:
browser.reloadWithFlags(Components.interfaces.nsIWebNavigation.LOAD_FLAGS_BYPASS_PROXY|Components.interfaces.nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE);
See https://developer.mozilla.org/en/XUL/browser for documentation on the <browser> element.
Edit: Given that this is apparently using JavaXPCOM the code seems to be correct with the exception that the entire try .. catch block should be removed. The only flag should be LOAD_FLAGS_BYPASS_CACHE to make sure you don't get a cached response.
I'm using LLBLGen and I have some code like so:
if (onlyRecentMessages)
{
messageBucket.PredicateExpression.Add(MessageFields.DateEffective >= DateTime.Today.AddDays(-30));
}
var messageEntities = new EntityCollection<MessageEntity>();
using (var myAdapter = PersistenceLayer.GetDataAccessAdapter())
{
myAdapter.FetchEntityCollection(messageEntities, messageBucket);
}
I'm currently getting a SqlException on the FetchEntityCollection line. The error is:
System.Data.SqlClient.SqlException: The incoming tabular data stream (TDS) remote procedure call (RPC) protocol stream is incorrect. Too many parameters were provided in this RPC request. The maximum is 2100.
but that's a side note. What I actually want to be able to do is include the generated SQL in a custom exception in my code. So for instance something like this:
using (var myAdapter = PersistenceLayer.GetDataAccessAdapter())
{
try
{
myAdapter.FetchEntityCollection(messageEntities, messageBucket);
}
catch (SqlException ex)
{
throw new CustomSqlException(ex, myAdapter.GeneratedSqlFromLastOperation);
}
}
Of course, there is no such property as GeneratedSqlFromLastOperation. I'm aware that I can configure logging, but I would prefer to have the information directly in my stack track / exception so that my existing exception logging infrastructure can provide me with more information when these kinds of errors occur.
Thanks!
Steve
You should get an ORMQueryExecutionException, which contains the full query in the description. The query's execute method wraps all exceptions in an ORMQueryExecutionException and stores the query in the description.
ps: please, if possible ask llblgen pro related questions on our forums, as we don't monitor stackoverflow frequently. Thanks. :)