C# ASP.NET WebAPI更改文件名？

我正在尝试将图像的文件名更改为我在输入框中发布的值

username

。文件将上载到服务器，并且在覆盖

GetLocalFileName

后，文件名将从“BodyPart_uuz（xyz）”更改为原始文件名。如何将它们重命名为输入框中提供的值

<form name="form1" method="post" enctype="multipart/form-data" action="api/poster/postformdata">
            <div class="row-fluid fileform">
                <div class="span3"><strong>Username:</strong></div>
                <input name="username" value="test" type="text" readonly/>
            </div>

            <div class="row-fluid fileform">
                <div class="span3"><strong>Poster:</strong></div>
                <div class="span4"><input name="posterFileName" ng-model="posterFileName" type="file" /></div>
            </div>

            <div class="row-fluid fileform">
                 <div class="span8"><input type="submit" value="Submit" class="btn btn-small btn-primary submitform" /></div>
            </div>
</form>

---

一种方法是重写

ExecutePostProcessingAsync

方法，如下所示：

public override async Task ExecutePostProcessingAsync()
{
    await  base.ExecutePostProcessingAsync();

    // By this time the file would have been uploaded to the location you provided
    // and also the dictionaries like FormData and FileData would be populated with information
    // that you can use like below

    string targetFileName = FormData["username"];

    // get the uploaded file's name
    string currentFileName = FileData[0].LocalFileName;

    //TODO: rename the file
}

---

谢谢。我不知道如何用新名称复制文件并删除旧文件。如何在

ExecutePostProcessingAsync（）

本身中实现这一点？

public override async Task ExecutePostProcessingAsync()
{
    await  base.ExecutePostProcessingAsync();

    // By this time the file would have been uploaded to the location you provided
    // and also the dictionaries like FormData and FileData would be populated with information
    // that you can use like below

    string targetFileName = FormData["username"];

    // get the uploaded file's name
    string currentFileName = FileData[0].LocalFileName;

    //TODO: rename the file
}