小编Wea*_*nie的帖子

模型

public partial class Assignment
{
    public Assignment()
    {
        this.CourseAvailables = new HashSet<CourseAvailable>();
    }

    public string AssignmentID { get; set; }
    public Nullable<System.DateTime> SubmissionDate { get; set; }
    public string Status { get; set; }
    public Nullable<decimal> Mark { get; set; }
    public string Comments { get; set; }
    public string FileLocation  { get; set; }
    public virtual ICollection<CourseAvailable> CourseAvailables { get; set; }
}}

调节器

 public ActionResult Create(Assignment assignment)
    {
        if (ModelState.IsValid)
        {


            db.Assignments.Add(assignment);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        return …

Delete单击后，这就是我的功能。谁能告诉我如何执行简单的确认功能？

ASP.net C＃。

以前我有这个

ScriptManager.RegisterStartupScript(this, 
       this.GetType(),
       "script",
       "confirm('Are you sure you want to Delete Your Discussion?');", 
       true);

但以上代码在删除后运行。

protected void lnk_delete_Click(object sender, EventArgs e)
{
    GridViewRow grdrow = (GridViewRow)((LinkButton)sender).NamingContainer;
    string fieldID = grdrow.Cells[0].Text;

    string query = "Delete from Comment where DiscussionID=@id";

    SqlCommand cmd = new SqlCommand(query, cn);
    cmd.Parameters.AddWithValue("@id", fieldID);

    cn.Open();
    cmd.ExecuteNonQuery();
    cn.Close();

    string query1 = "Delete from Discussion where DIscussionID=@id";

    SqlCommand cmd1 = new SqlCommand(query1, cn);
    cmd1.Parameters.AddWithValue("@id", fieldID);

    cn.Open();
    cmd1.ExecuteNonQuery();
    cn.Close();

    GridView1.DataBind();
}

有人介意指导我，如何将文件保存到我的数据库中，并在可能的情况下检索它，我还是这个 C# 和 MVC 4 的新手。我的数据库分配包含一个属性调用 FileLocation，它是 varBinary (MAX)。

模型

 public partial class Assignment
{
    public Assignment()
    {
        this.CourseAvailables = new HashSet<CourseAvailable>();
    }



    public string AssignmentID { get; set; }
    public Nullable<System.DateTime> SubmissionDate { get; set; }
    public string Status { get; set; }
    [Range(0,100, ErrorMessage="Only Value between 0-100 is accepted.")]
    public Nullable<decimal> Mark { get; set; }
    public string Comments { get; set; }
    public byte[] FileLocation { get; set; }

    public virtual ICollection<CourseAvailable> CourseAvailables { get; set; } …

我之前已将文件上传到我的数据库,现在我想从我的数据库下载该文件.

谁能告诉我怎么样？我是C#和ASP.NET MVC的新手.

控制器:

public ActionResult Details(string id = null)
{
        Assignment assignment = db.Assignments.Find(id);

        if (assignment == null)
        {
            return HttpNotFound();
        }

        return View(assignment);
}

模型:

public string AssignmentID { get; set; }
public Nullable<System.DateTime> SubmissionDate { get; set; }
public string Status { get; set; }
[Range(0,100, ErrorMessage="Only Value between 0-100 is accepted.")]
public Nullable<decimal> Mark { get; set; }
public string Comments { get; set; }
public byte[] FileLocation { get; set; }

视图:

<div class="display-label">
    <%: …