使用多部分/表单数据上传文件

Question

我使用此代码上传文件，但未上传

var content = new MultipartFormDataContent();

var fileContent = new ByteArrayContent(System.IO.File.ReadAllBytes(filePath));

fileContent.Headers.ContentDisposition =
    new ContentDispositionHeaderValue("attachment")
    {
        FileName = Path.GetFileName(filePath)
    };

content.Add(fileContent);
var responce = client.PostAsync(queryString.ToString(), content).Result;

Answer 1

尝试这个

<form id="form1" runat="server">
<asp:FileUpload id="FileUploadControl" runat="server" />
<asp:Button runat="server" id="UploadButton" text="Upload" onclick="UploadButton_Click" /> <br /><br />
<asp:Label runat="server" id="StatusLabel" text="Upload status: " />
</form>

protected void UploadButton_Click(object sender, EventArgs e)
{
if(FileUploadControl.HasFile)
{
    try
    {
        string filename = Path.GetFileName(FileUploadControl.FileName);
        FileUploadControl.SaveAs(Server.MapPath("~/") + filename);
        StatusLabel.Text = "Upload status: File uploaded!";
    }
    catch(Exception ex)
    {
        StatusLabel.Text = "Upload status: The file could not be uploaded. The following error occured: " + ex.Message;
    }
}
}

状态消息应清楚表明它们的全部含义，您可以根据需要进行更改。

Answer 2

试试这个代码。 它的工作正常。 只需要在解决方案资源管理器中创建一个名为“ Upload”的文件夹，即可上传文件。

在您的aspx页面中

<asp:FileUpload runat="server" ID="FileUploadContacts" Width="300px" />
<asp:Button runat="server" ID="btnUpload" Text="Upload" OnClick="btnUpload_OnClick" />

在后面的代码中执行此操作

protected void btnUpload_OnClick(object sender, EventArgs e)
{
    try
    {
        if (FileUploadContacts.HasFile)
        {
            FileUploadContacts.SaveAs(Server.MapPath("Uploads//") + FileUploadContacts.FileName);
            this.lblMessage.Text = "File uploaded Successfully!>";
        }
        else
        {
            this.lblMessage.Text = "File not uploaded!>";
        }
    }
    catch (Exception ex)
    {
        Logger.WriteException(ex);
    }
}