MVC3Razor简单文件操作

 本节没有什么技术含量。权当做给新手做个demo吧。 

1 写入text

2追加text

3读取text

4删除文件

 @{ 

    View.Title = "File1"; 
    Layout = "~/Views/Shared/_Layout.cshtml";
    var path = Server.MapPath("~/App_Data/testdata.txt");
    string[] data = null; 
    //判断是否存在 
    if (File.Exists(path)) { 
        //读取text 
        data = File.ReadAllLines(path); 
        //追加text 
        var text2 = "AppendAllText to txt success!" + DateTime.Now + Environment.NewLine; 
        File.AppendAllText(path, text2); 
    } else {
        //写入 
        var text1 = "write to txt success!" + DateTime.Now + Environment.NewLine; 
        //覆盖 
        File.WriteAllText(path, text1);
    } 
    //删除 
    if (!Request["action"].IsEmpty()) { 
        if (Request["action"].ToString() == "delete") {             
            File.Delete(path); 
        } 
    } 
}
<h2> 
    向TXT文件里写东西<br /> 
    @{ 
    } 
    @if (data != null) { 
        foreach (var item in data) { 
@item  <br /> 
        } 
    } 
</h2> 
<a href="?action=delete">delete</a>

5上传文件

@{ 
    View.Title = "File2"; 
    Layout = "~/Views/Shared/_Layout.cshtml";
    var uploadfile = Request.Files["uploadfile"];
    if (uploadfile != null) { 
        var filename = Path.GetFileName(uploadfile.FileName); 
        string filepath = Server.MapPath("~/Content/" + filename); 
        uploadfile.SaveAs(filepath); 
        @uploadfile.FileName 
         <a href="@Href("~/Content/" + filename)">上传的文件</a> 
    } 
} 

<h2> 
    上传 
</h2> 
<form action="" method="post" enctype="multipart/form-data"> 
<input type="file" name="uploadfile" /> 
<input type="submit" value="UpLoad" /> 
</form> 

通常我们不会把文件操作写到“轻快的view”里。我这里只是演示可以实现这些功能。其用到的都是大家熟悉的file等类。