我正在使用ASP .NET Web API,其中API的POST函数在C#代码中返回一个像这样的字节数组:
return Ok(outputStream.ToArray());
其中outputStream的类型为System.IO.MemoryStream,ToArray()返回一个字节数组。
此功能正在返回我想在浏览器中向用户显示的PDF流,或至少让他们保存。
我遇到了来自Stack Overflow的JavaScript example,它显示了如何从Base64编码的字符串中获取Blob并显示它,当API返回Base64编码的字符串时,我能够使其工作;但是,当API返回如前所示的字节数组时,我无法使其工作。
我可以获得一些代码示例,说明如何在API返回字节数组时使其工作吗?
答案 0 :(得分:0)
我的JQuery Ajax POST请求如下所示:
function LoadPDF() {
var args = [];
var x = $.ajax({
type: "POST",
url: "DirectoryQuery.aspx/GetFullPdf",
contentType: "application/json; charset=UTF-8",
responseType: "text/plain; charset=UTF-8",
async: true,
dataType: "json",
processData: "false",
success: OnSuccess,
error: OnErrorCall
});
function OnSuccess(response) {
var byteArray = new Uint8Array(response.d);
saveTextAsFile("document.pdf", byteArray);
}
function OnErrorCall(response) {
console.log(response);
//location.reload();
}
}
尝试file-save-as.js,如下所示:
function saveTextAsFile(fileNameToSaveAs, textToWrite) {
/* Saves a text string as a blob file*/
var ie = navigator.userAgent.match(/MSIE\s([\d.]+)/),
ie11 = navigator.userAgent.match(/Trident\/7.0/) && navigator.userAgent.match(/rv:11/),
ieEDGE = navigator.userAgent.match(/Edge/g),
ieVer = (ie ? ie[1] : (ie11 ? 11 : (ieEDGE ? 12 : -1)));
if (ie && ieVer < 10) {
console.log("No blobs on IE ver<10");
return;
}
var textFileAsBlob = new Blob([textToWrite], {
type: 'text/plain'
});
if (ieVer > -1) {
window.navigator.msSaveBlob(textFileAsBlob, fileNameToSaveAs);
} else {
var downloadLink = document.createElement("a");
downloadLink.download = fileNameToSaveAs;
downloadLink.href = window.URL.createObjectURL(textFileAsBlob);
downloadLink.onclick = function (e) { document.body.removeChild(e.target); };
downloadLink.style.display = "none";
document.body.appendChild(downloadLink);
downloadLink.click();
}
}