excel - getFileAsync 导致 Excel 崩溃

问题描述

我正在为 Excel 构建一个 office-js 加载项。我需要将当前工作簿上传到后端服务器。我已经从 Micrsoft 文档中实现了一个示例，它在我第一次调用它时似乎工作正常，但在随后的调用中，它会导致 Excel 崩溃。我正在使用 Excel 365 版本 1812（内部版本 11126.20132）

这是 MS 文档中示例的链接： https ://docs.microsoft.com/en-us/javascript/api/office/office.document

此页面上有很多示例，为了找到我正在使用的搜索“以下示例获取 Office Open XML 中的文档”，我已包含以下示例以方便参考。

代码只是获取当前文件并将字符转储到控制台的日志中。它第一次运行良好，但第二次使 Excel 崩溃——在它显示了 FileContent 的长度之后。

export function getDocumentAsCompressed() {
    Office.context.document.getFileAsync(Office.FileType.Compressed, { sliceSize: 65536 /*64 KB*/ },
        function (result) {
            if (result.status == "succeeded") {
                // If the getFileAsync call succeeded, then
                // result.value will return a valid File Object.
                var myFile = result.value;
                var sliceCount = myFile.sliceCount;
                var slicesReceived = 0, gotAllSlices = true, docdataSlices = [];
                console.log("File size:" + myFile.size + " #Slices: " + sliceCount);

                // Get the file slices.
                getSliceAsync(myFile, 0, sliceCount, gotAllSlices, docdataSlices, slicesReceived);
            }else {
                console.log("Error:", result.error.message);
            }
    });
}

function getSliceAsync(file, nextSlice, sliceCount, gotAllSlices, docdataSlices, slicesReceived) {
    file.getSliceAsync(nextSlice, function (sliceResult) {
        if (sliceResult.status == "succeeded") {
            if (!gotAllSlices) { // Failed to get all slices, no need to continue.
                return;
            }

            // Got one slice, store it in a temporary array.
            // (Or you can do something else, such as
            // send it to a third-party server.)
//            console.log("file part",sliceResult.value.data)
            docdataSlices[sliceResult.value.index] = sliceResult.value.data;
            if (++slicesReceived == sliceCount) {
              // All slices have been received.
              file.closeAsync();
              onGotAllSlices(docdataSlices);
            }
            else {
                getSliceAsync(file, ++nextSlice, sliceCount, gotAllSlices, docdataSlices, slicesReceived);
            }
        }
            else {
                gotAllSlices = false;
                file.closeAsync();
                console.log("getSliceAsync Error:", sliceResult.error.message);
            }
    });
}

function onGotAllSlices(docdataSlices) {
    var docdata = [];
    for (var i = 0; i < docdataSlices.length; i++) {
        docdata = docdata.concat(docdataSlices[i]);
    }

    var fileContent = new String();
    for (var j = 0; j < docdata.length; j++) {
        fileContent += String.fromCharCode(docdata[j]);
    }

   console.log("fileContent.length",fileContent.length)

    // Now all the file content is stored in 'fileContent' variable,
    // you can do something with it, such as print, fax...
}

这是结果

File size:21489 #Slices: 1
fileContent.length 21489

来自 Microsoft 文档的原始示例 ( https://docs.microsoft.com/en-us/javascript/api/office/office.document )

// The following example gets the document in Office Open XML ("compressed") format in 65536 bytes (64 KB) slices.
// Note: The implementation of app.showNotification in this example is from the Visual Studio template for Office Add-ins.
function getDocumentAsCompressed() {
    Office.context.document.getFileAsync(Office.FileType.Compressed, { sliceSize: 65536 /*64 KB*/ }, 
        function (result) {
            if (result.status == "succeeded") {
            // If the getFileAsync call succeeded, then
            // result.value will return a valid File Object.
            var myFile = result.value;
            var sliceCount = myFile.sliceCount;
            var slicesReceived = 0, gotAllSlices = true, docdataSlices = [];
            app.showNotification("File size:" + myFile.size + " #Slices: " + sliceCount);

            // Get the file slices.
            getSliceAsync(myFile, 0, sliceCount, gotAllSlices, docdataSlices, slicesReceived);
            }
            else {
            app.showNotification("Error:", result.error.message);
            }
    });
}

function getSliceAsync(file, nextSlice, sliceCount, gotAllSlices, docdataSlices, slicesReceived) {
    file.getSliceAsync(nextSlice, function (sliceResult) {
        if (sliceResult.status == "succeeded") {
            if (!gotAllSlices) { // Failed to get all slices, no need to continue.
                return;
            }

            // Got one slice, store it in a temporary array.
            // (Or you can do something else, such as
            // send it to a third-party server.)
            docdataSlices[sliceResult.value.index] = sliceResult.value.data;
            if (++slicesReceived == sliceCount) {
              // All slices have been received.
              file.closeAsync();
              onGotAllSlices(docdataSlices);
            }
            else {
                getSliceAsync(file, ++nextSlice, sliceCount, gotAllSlices, docdataSlices, slicesReceived);
            }
        }
            else {
                gotAllSlices = false;
                file.closeAsync();
                app.showNotification("getSliceAsync Error:", sliceResult.error.message);
            }
    });
}

function onGotAllSlices(docdataSlices) {
    var docdata = [];
    for (var i = 0; i < docdataSlices.length; i++) {
        docdata = docdata.concat(docdataSlices[i]);
    }

    var fileContent = new String();
    for (var j = 0; j < docdata.length; j++) {
        fileContent += String.fromCharCode(docdata[j]);
    }

    // Now all the file content is stored in 'fileContent' variable,
    // you can do something with it, such as print, fax...
}

// The following example gets the document in PDF format.
Office.context.document.getFileAsync(Office.FileType.Pdf,
    function(result) {
        if (result.status == "succeeded") {
            var myFile = result.value;
            var sliceCount = myFile.sliceCount;
            app.showNotification("File size:" + myFile.size + " #Slices: " + sliceCount);
            // Now, you can call getSliceAsync to download the files,
            // as described in the previous code segment (compressed format).

            myFile.closeAsync();
        }
        else {
            app.showNotification("Error:", result.error.message);
        }
}
);

标签： exceloffice-js

excel - getFileAsync 导致 Excel 崩溃

问题描述

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