[英]upload image from virtual directory to server via web api 2.0
I have web api using which I am able to upload image to server when client is mobile app but not web client is asp.net web from. 我有Web api,当客户端是移动应用程序但Web客户端不是asp.net Web时,我可以使用它向服务器上传图像。
I am able to save image to virtual folder but then not able to upload via web api which stores both web/mobile uploaded images. 我能够将图片保存到虚拟文件夹,但无法通过同时存储Web /移动设备上传图片的Web API上传。
I am sure I am making mistake in writing client side code in asp.net or not able to handle proper postback of fileupload control please guide me where I am wrong. 我确定在asp.net中编写客户端代码时出错,或者无法处理正确的文件上传控制回发,请在错误的地方指导我。
here is API - " stackoverflow.com/a/35449422/8875271 "; 这是API-“ stackoverflow.com/a/35449422/8875271 ”; which I am using I just want client code/sample for asp.net web form using image upload control I have tired this but this didn't seems working please help I am stuck. 我正在使用的我只希望使用图像上传控件的asp.net Web表单的客户端代码/示例,我对此感到厌倦,但这似乎无法正常工作,请帮助我。
API working file on mobile as well as on postman. 移动和邮递员上的API工作文件。
Design 设计
<asp:UpdatePanel ID="filepanel" runat="server">
<ContentTemplate>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:LinkButton ID="LinkButton1" runat="server" Text="Attach" OnClick="LinkButton1_Click"></asp:LinkButton>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="LinkButton1" />
</Triggers>
</asp:UpdatePanel>
code 码
protected void LinkButton1_Click(object sender, EventArgs e)
{
if (FileUpload1.HasFile)
{
System.Diagnostics.Debug.WriteLine(" uploaded");
APIs api = new APIs();
using (HttpClient client = new HttpClient())
{
try
{
string filename = FileUpload1.PostedFile.FileName;
Session["FileUpload1"] = filename;
FileUpload1.SaveAs(Server.MapPath("images\\" + FileUpload1.PostedFile.FileName));
using (var fileStream = File.Open(Server.MapPath("images\\" + Session["FileUpload1"].toString() ), FileMode.OpenOrCreate, FileAccess.Write, FileShare.Read))
{
System.Diagnostics.Debug.WriteLine("image file opened");
var content = new MultipartFormDataContent();
if(fileStream!=null)
content.Add(new StreamContent(fileStream));
var response = client.PostAsync(api.pictureUpload, content).Result; -------Line 174
if (response.IsSuccessStatusCode)
{
System.Diagnostics.Debug.WriteLine("File Uploaded Successfully");
}
else
{
System.Diagnostics.Debug.WriteLine("File Uploaded
UnSuccessfully"+response.RequestMessage);
}
}
}
catch (IOException iex)
{
System.Diagnostics.Debug.WriteLine("io exception:" + iex.ToString());
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("image path:" + ex.ToString());
}
}
}
else
{
System.Diagnostics.Debug.WriteLine("no file");
}
}
error 错误
System.AggregateException: One or more errors occurred. --->
System.NotSupportedException: Stream does not support reading.
at System.IO.Stream.BeginReadInternal(Byte[] buffer, Int32 offset, Int32
count, AsyncCallback callback, Object state, Boolean serializeAsynchronously)
at System.IO.FileStream.BeginRead(Byte[] array, Int32 offset, Int32 numBytes,
AsyncCallback userCallback, Object stateObject)
at System.Net.Http.StreamToStreamCopy.StartRead()
--- End of inner exception stack trace ---
at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
at System.Threading.Tasks.Task`1.get_Result()
at TransferToMIR.LinkButton1_Click(Object sender, EventArgs e) in path\TransferToMIR.aspx.cs:line 174
---> (Inner Exception #0) System.NotSupportedException: Stream does not support reading.
at System.IO.Stream.BeginReadInternal(Byte[] buffer, Int32 offset, Int32 count, AsyncCallback callback, Object state, Boolean serializeAsynchronously)
at System.IO.FileStream.BeginRead(Byte[] array, Int32 offset, Int32 numBytes, AsyncCallback userCallback, Object stateObject)
at System.Net.Http.StreamToStreamCopy.StartRead()<---
这项更改使其有效
using (var fileStream = File.OpenRead(Server.MapPath("images\\" + Session["Filename"].toString())))
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