Web API 返回 csv 文件 [英] Web API return csv file
问题描述
我需要从 web api 控制器获取一个 csv 文件.我无法显示另存为"对话框.页面上只显示文本输出.我都试过了，从 jquery 调用导出，也尝试了普通的旧 html
I need to get a csv file from web api controller. I can not get "Save As" dialog to show up. Only text output shows up on the page. I tried both, calling Export from jquery and also plain old html
控制器:
[System.Web.Http.HttpGet]
public HttpResponseMessage Export()
{
StringBuilder sb = new StringBuilder();
IEnumerable<CustomerDiscount> list = this.subscriberRepository.GetSubscribers();
foreach (CustomerDiscount item in list)
{
sb.AppendFormat(
"{0};{1};{2};",
item.CustomerName,
item.CustomerNumber,
Environment.NewLine);
}
MemoryStream stream = new MemoryStream();
StreamWriter writer = new StreamWriter(stream);
writer.Write(sb.ToString());
writer.Flush();
stream.Position = 0;
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
result.Content = new StreamContent(stream);
result.Content.Headers.ContentType =
new MediaTypeHeaderValue("text/csv");
result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") { FileName = "Export.csv" };
return result;
}
添加了这一行:
result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") { FileName = "Export.csv" };
还是不行
我这样称呼它:
<a id="export" href="/Relay/Billing/Export" class="btn btn-primary">Export</a>
也试过这样:
$("#export").click(function () {
$.post("/Relay/Billing/Export", { type: $("#discountType").val() })
.done(function (data) {
});
});
仍然没有另存为框
推荐答案
我不知道这是否是正确的协议，但我以前是这样做的.因此，您有一个网页，您将在该网页中调用一个 API，该 API 将响应文件，并且应该由浏览器的另存为对话框处理.
I do not know whether this is proper protocol but this is how I did it before. So you have a web page from which you will invoke an API that will response with the file and it should be handled by browser's save as dialog.
HTML:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
function save() {
window.open('http://localhost:45719/api/home?id=12', '_blank', '');
}
</script>
</head>
<body>
<a class="btn btn-primary" onclick="save()">Export</a>
</body>
</html>
动作:
public HttpResponseMessage Get(int id)
{
MemoryStream stream = new MemoryStream();
StreamWriter writer = new StreamWriter(stream);
writer.Write("Hello, World!");
writer.Flush();
stream.Position = 0;
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
result.Content = new StreamContent(stream);
result.Content.Headers.ContentType = new MediaTypeHeaderValue("text/csv");
result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") { FileName = "Export.csv" };
return result;
}
这对我来说适用于最新的 Chrome 和 Firefox.
This is working for me in both Chrome and Firefox latest.
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