Question

我正在尝试在MVC网格中实现下载功能。这是演示代码。

模型

<ul>
    <li ng-repeat="item in firstArray | limitTo:secondArray.length">{{item}}</li>
</ul>

查看

slices<-c(pu1_500,pu501_1000,pu1001_2000)
     cols <- c("red","blue","green")
     percentlabels<- round(100*slices/sum(slices), 1)
     pie3D(slices,main="piechart",col=cols,labels=percentlabels,explode=0.1)
     legend("topright", c("1-500","501-1000","1001-2000"), cex=0.8,fill=cols)

控制器

 public class Student
    {
        public string Name { get; set; }
        public string Address { get; set; }

        public string ByteArray { get; set; }

        public List<Student> StudentList { get; set; }

    }

在此代码中，我试图在MVC Web网格中显示学生详细信息以及文件下载选项。

但是在这里，我没有得到如何下载base64string格式的文件。

请协助我解决问题。

先谢谢。

Answer 1

您需要为WebGrid添加一个额外的列，其中包含一个名为“下载”的链接。此链接需要在控制器中调用下载操作并通过单击的student.Below的base64属性。是一个完整的工作示例，希望它可以帮助您：

<强>控制器：

public class StudentController : Controller
{
    public ActionResult Index()
    {
        Student obj = new Student();
        byte[] bytes = System.IO.File.ReadAllBytes("F:\\test.txt");
        string ba = Convert.ToBase64String(bytes);

        var s1 = new Student { Name = "Student1", Address = "Address1", ByteArray = ba };
        var s2 = new Student { Name = "Student2", Address = "Address2", ByteArray = ba };
        var s3 = new Student { Name = "Student3", Address = "Address3", ByteArray = ba };

        obj.StudentList = new List<Student>() { s1, s2, s3 };
        return View(obj);
    }

    [HttpGet]
    public FileResult DownloadAction(string file)
    {
        byte[] fileBytes = Convert.FromBase64String(file);
        string fileName = "test.txt";
        return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet, fileName);
    }
}

查看：

@model Fileuploaddemo.Models.Student @{ var grid = new WebGrid(Model.StudentList);} @Html.LabelFor(model => model.Name) @Html.EditorFor(model => model.Name) @Html.LabelFor(model => model.Address) @Html.EditorFor(model => model.Address) @grid.GetHtml( htmlAttributes: new { id = "gridT1", @calss = "" }, tableStyle: "webgrid-table", headerStyle: "webgrid-header", columns: grid.Columns( grid.Column(columnName: "Name", header: "Name"), grid.Column(columnName: "Address", header: "Address"), grid.Column("Download", "Download", format: @<text> @Html.ActionLink("Download", "DownloadAction", "Student", new { file = item.ByteArray },null) </text>) ))

使用Base64 String在MVC Webgrid中下载问题

1 个答案: