HttpPostfile 在尝试上传图像时返回空值
本文关键字：图像 返回 空值 HttpPostfile | 更新日期: 2023-09-27 18:32:53
我正在尝试在 mvc 中上传图像，但它一直返回 null。
控制器：
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult PostRollOutForm([Bind(Include = "TankSerNo,NozzleSerNo,NozzleLocationDescript,NozzleIdentifier,NozzleFunction,NozzleType,NozzleDiameterorHeight,NozzleWidth,NozzleLocation,NozzleHeight,NozzleWeldSize,NozzleThickness,NozzleComments,RepadShape,RepadHeight,RepadWidth,RepadWeldSize,RepadThickness,TelTale,WeldSpacetoCornerWeld,WeldSpacetoVerticalWeld,WeldSpacetoAdjacentNozzle,WeldSpacetoHorizontalWeld,WeldDetail,CoverThickness,LengthToFlange,LenghtToCtrofValve,CenterLineorLowerHeight,DrawCircleorNot,CornerRadius,Dimension,Label,NozzleThicknessT,NozzleThicknessR,NozzleThicknessB,NozzleThicknessL,Photo")] RollOutViewModel rollout, HttpPostedFileBase uploadedfile, string FailURL)
{
if (ModelState.IsValid)
{
//upload image attempt 1
if(uploadedfile != null) {
RollOutFileUploadService service = new RollOutFileUploadService();
service.SaveFileDetails(uploadedfile, rollout.NozzleSerNo);
}
//attempt 2
else if (rollout.Photo != null)
{
RollOutFileUploadService service = new RollOutFileUploadService();
service.SaveFileDetails(uploadedfile, rollout.NozzleSerNo);
}
//form fields
ShellRollOut result = new ShellRollOut();
result.TankSerNo = rollout.TankSerNo;
result.NozzleSerNo = rollout.NozzleSerNo;
result.NozzleLocationDescript = rollout.NozzleLocationDescript;
result.NozzleIdentifier = rollout.NozzleIdentifier;
result.NozzleFunction = rollout.NozzleFunction;
result.NozzleType = rollout.NozzleType;
result.NozzleDiameterorHeight = rollout.NozzleDiameterorHeight;
result.NozzleWidth = rollout.NozzleWidth;
result.NozzleLocation = rollout.NozzleLocation;
result.NozzleHeight = rollout.NozzleHeight;
result.NozzleWeldSize = rollout.NozzleWeldSize;
result.NozzleThickness = rollout.NozzleThickness;
result.NozzleComments = rollout.NozzleComments;
result.RepadShape = rollout.RepadShape;
result.RepadHeight = rollout.RepadHeight;
result.RepadWidth = rollout.RepadWidth;
result.RepadWeldSize = rollout.RepadWeldSize;
result.RepadThickness = rollout.RepadThickness;
result.TelTale = rollout.TelTale;
result.WeldSpacetoCornerWeld = rollout.WeldSpacetoCornerWeld;
result.WeldSpacetoVerticalWeld = rollout.WeldSpacetoVerticalWeld;
result.WeldSpacetoAdjacentNozzle = rollout.WeldSpacetoAdjacentNozzle;
result.WeldSpacetoHorizontalWeld = rollout.WeldSpacetoHorizontalWeld;
result.CoverThickness = rollout.WeldSpacetoHorizontalWeld;
result.WeldDetail = rollout.WeldDetail;
result.LengthToFlange = rollout.LengthToFlange;
result.LenghtToCtrofValve = rollout.LenghtToCtrofValve;
result.CenterLineorLowerHeight = rollout.CenterLineorLowerHeight;
result.DrawCircleorNot = rollout.DrawCircleorNot;
result.CornerRadius = rollout.CornerRadius;
result.Dimension = rollout.Dimension;
result.Label = rollout.Label;
result.NozzleThicknessT = rollout.NozzleThicknessT;
result.NozzleThicknessR = rollout.NozzleThicknessR;
result.NozzleThicknessB = rollout.NozzleThicknessB;
result.NozzleThicknessL = rollout.NozzleThicknessL;
result.Tank = rollout.Tank;
db.ShellRollOuts.Add(result);
db.SaveChanges();
string url = Url.Action("ShellRollOut", new { TankSerNo = rollout.TankSerNo });
return Json(new { success = true, url = url }, JsonRequestBehavior.AllowGet);
}
return PartialView(FailURL, rollout);
}
查看模型：
public class RollOutViewModel
{
public Nullable<int> TankSerNo { get; set; }
public int NozzleSerNo { get; set; }
public string NozzleLocationDescript { get; set; }
public string NozzleIdentifier { get; set; }
public string NozzleFunction { get; set; }
public string NozzleType { get; set; }
public Nullable<float> NozzleDiameterorHeight { get; set; }
public Nullable<float> NozzleWidth { get; set; }
public Nullable<float> NozzleLocation { get; set; }
public Nullable<float> NozzleHeight { get; set; }
public Nullable<float> NozzleWeldSize { get; set; }
public Nullable<float> NozzleThickness { get; set; }
public string NozzleComments { get; set; }
public string RepadShape { get; set; }
public Nullable<float> RepadHeight { get; set; }
public Nullable<float> RepadWidth { get; set; }
public Nullable<float> RepadWeldSize { get; set; }
public Nullable<float> RepadThickness { get; set; }
public string TelTale { get; set; }
public Nullable<float> WeldSpacetoCornerWeld { get; set; }
public Nullable<float> WeldSpacetoVerticalWeld { get; set; }
public Nullable<float> WeldSpacetoAdjacentNozzle { get; set; }
public Nullable<float> WeldSpacetoHorizontalWeld { get; set; }
public string WeldDetail { get; set; }
public Nullable<float> CoverThickness { get; set; }
public string LengthToFlange { get; set; }
public string LenghtToCtrofValve { get; set; }
public string CenterLineorLowerHeight { get; set; }
public string DrawCircleorNot { get; set; }
public Nullable<float> CornerRadius { get; set; }
public string Dimension { get; set; }
public string Label { get; set; }
public Nullable<float> NozzleThicknessT { get; set; }
public Nullable<float> NozzleThicknessR { get; set; }
public Nullable<float> NozzleThicknessB { get; set; }
public Nullable<float> NozzleThicknessL { get; set; }
public HttpPostedFileBase Photo { get; set; }
public virtual Tank Tank { get; set; }
}
视图：
@using (Html.BeginForm("PostRollOutForm", "Tanks", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
@Html.AntiForgeryToken()
<div class="modal-body">
<div class="form-horizontal">
@Html.HiddenFor(x => x.NozzleIdentifier, new { @Value = "" })
@Html.HiddenFor(x => x.TankSerNo)
@Html.HiddenFor(x => x.Tank)
@Html.HiddenFor(x => x.NozzleSerNo)
<h4>Nozzle Data</h4>
<div class="form-group">
@Html.LabelFor(model => model.NozzleFunction, "Nozzle Function", htmlAttributes: new { @class = "control-label col-md-4" })
<div class="col-md-8">
@Html.DropDownListFor(model => model.NozzleFunction, new List<SelectListItem>
{
new SelectListItem { Text = "Spiral Stairway", Value = "Spiral Stairway", Selected = true},
new SelectListItem { Text = "Cat Walk", Value = "Cat Walk"},
new SelectListItem { Text = "Vertical Ladder", Value = "Vertical Ladder"},
new SelectListItem { Text = "Platform", Value = "Platform"},
new SelectListItem { Text = "Radial Stairway", Value = "Radial Stairway"},
},
new { @class = "form-control " })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.NozzleDiameterorHeight, "Hand Rail Height", htmlAttributes: new { @class = "control-label col-md-4" })
<div class="col-md-8">
@Html.EditorFor(model => model.NozzleDiameterorHeight, new { htmlAttributes = new { @id = "HandRailHeight", @class = "form-control " } })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.NozzleHeight, "Height Step or Rise", htmlAttributes: new { @class = "control-label col-md-4" })
<div class="col-md-8">
@Html.EditorFor(model => model.NozzleHeight, new { htmlAttributes = new { @id = "HeightStep", @class = "form-control " } })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.NozzleWidth, "Width of Run", htmlAttributes: new { @class = "control-label col-md-4" })
<div class="col-md-8">
@Html.EditorFor(model => model.NozzleWidth, new { htmlAttributes = new { @id = "WidthRun", @class = "form-control " } })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.RepadHeight, "Last Step", htmlAttributes: new { @class = "control-label col-md-4" })
<div class="col-md-8">
@Html.EditorFor(model => model.RepadHeight, new { htmlAttributes = new { @id = "RepadHeight", @class = "form-control " } })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.RepadWidth, "Cage Height", htmlAttributes: new { @class = "control-label col-md-4" })
<div class="col-md-8">
@Html.EditorFor(model => model.RepadWidth, new { htmlAttributes = new { @id = "RepadWidth", @class = "form-control " } })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.RepadShape, "Shape of Access", htmlAttributes: new { @class = "control-label col-md-4" })
<div class="col-md-8">
@Html.DropDownListFor(model => model.RepadShape, new List<SelectListItem>
{
new SelectListItem { Text = "SW+", Value = "SW+", Selected = true},
new SelectListItem { Text = "SW-", Value = "SW-"},
new SelectListItem { Text = "CATWALK", Value = "CATWALK"},
new SelectListItem { Text = "CAGED LADDER", Value = "CAGED LADDER"},
new SelectListItem { Text = "LADDER", Value = "LADDER"},
},
new { @class = "form-control " })
</div>
</div>
<h4>Miscellaneous</h4>
<div class="form-group">
@Html.LabelFor(model => model.DrawCircleorNot, "Draw Pipe Circle?", htmlAttributes: new { @class = "control-label col-md-4" })
<div class="col-md-8">
@Html.DropDownListFor(model => model.DrawCircleorNot, new List<SelectListItem>
{
new SelectListItem { Text = "CIRCLE", Value = "CIRCLE"},
new SelectListItem { Text = "NO CIRCLE", Value = "NO CIRCLE", Selected = true},
},
new { @class = "form-control " })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Label, "Label?", htmlAttributes: new { @class = "control-label col-md-4" })
<div class="col-md-8">
@Html.DropDownListFor(model => model.Label, new List<SelectListItem>
{
new SelectListItem { Text = "LABEL", Value = "LABEL", Selected = true},
new SelectListItem { Text = "NO LABEL", Value = "NO LABEL"},
},
new { @class = "form-control " })
</div>
</div>
<hr />
<div class="form-group">
@Html.Label("Image of Shell Appurtenance", htmlAttributes: new { @class = "control-label col-md-4" })
<div class="col-md-8">
@Html.TextBoxFor(a=> a.Photo, new { type = "file", accept = "image/*", capture = "camera", @class = "btn btn-default btn-sm" })
<input name="uploadefile" type="file" accept="image/*" capture />
</div>
</div>
</div>
@Html.HiddenFor(h => h.Tank.Height, new { @id = "TankHeight" })
</div>
据我所知，发布的文件的命名约定应该是正确的，所以我不确定为什么它仍然返回 null。任何帮助或建议将不胜感激！
方法参数名称应与输入名称匹配。在您的代码中，两者并不相同。
因此，将剃须刀代码更改为
<input name="uploadedfile" type="file"/>