文件上传到数据库与下载
作者：互联网
基于 FinUICore，实现文件上传到数据库与下载
最终效果如图：
功能实现：
1、表单有两个上传字段，用于上传2个文件；
2、点 “浏览”选择错误的文件，可通过 “删除->重置上传控件” 重置；
3、点“保存并关闭” 保存数据并上传文件；
4、重新打开工序报工，可编辑（已保存的表单数据和文件名会重新显示到页面）。如果已上传文件，则上传控件后的 “下载” 和 “删除->删除” 按钮可用；
5、编辑状态，如上传控件重选文件，“保存并关闭”则会覆盖原文件；
6、点 “删除->删除”，可删除文件，不需要点保存即删除（删除前提示确认）；删除成功后，控件中的文件名清除、 “下载” 和 “删除->删除” 按钮不可用；
以下介绍实现步骤：
一、创建模型
public class R_QC: IKeyID
{
[Key]
public int ID { get; set; }
[Display(Name ="PO工序")]
[Required]
public int POProcID { get; set; }
public B03_POProc B03_POProc { get; set; }
[Display(Name ="送检人员")]
public int? SQCID { get; set; }
public User SQC { get; set; }
[Display(Name ="检验人员")]
public int? QCID { get; set; }
public User QC { get; set; }
[Display(Name ="计划检完时间")]
public DateTime? PFinishTime { get; set; }
[Display(Name = "开始检验时间")]
public DateTime? StartTime { get; set; }
[Display(Name = "完成检验时间")]
public DateTime? EndTime { get; set; }
[Display(Name = "检验结果")]
[StringLength(50)]
public string QCResult { get; set; }
[Display(Name = "检验单上传")]
[StringLength(200)]
public string QCReport { get; set; }
[Display(Name = "检验单上传")]
public byte[] QCReportContent { get; set; }
[Display(Name = "拍照留底")]
[StringLength(200)]
public string Photo { get; set; }
[Display(Name = "拍照留底")]
public byte[] PhotoContent { get; set; }
[Display(Name = "备注")]
[StringLength(500)]
public string Remark { get; set; }
[Display(Name = "操作人")]
public int OperatorID { get; set; }
public User Operator { get; set; }
[Display(Name = "状态")]
public int StatusID { get; set; }
public A07_Statu A07_Statu { get; set; }
[Display(Name = "创建时间")]
public DateTime? CreateTime { get; set; }
}
生成的数据表如下图，其中，2个红框为两个文件记录字段，一个字段记录文件名，一个字段存储文件。
二、前端界面设计
1、为了实现“上传控件”、“删除”、“下载” 按钮在同一行，需要为 <f:FormRow > 控件标签增加 ColumnWidths="100%" 属性。
2、在上传控件后面添加一组菜单按钮，包含 “重置上传控件” 和 “删除”两个菜单按钮。
- 重置上传控件：点击上传控件的浏览按钮，且选择文件后，可能需要取消选择（不是重选，是取消、不想上传了），可使用该按钮重置、取消选择；方法是为 “重置上传控件” 按钮指定JS，通过 reset() 方法重置。
- 删除：编辑时，可能需要将已上传文件删除；按钮执行JS，JS弹框提示，点OK后，触发后台事件删除；”删除“ 代码见 “四、文件下载与文件删除”
@page
@model XXX.Pages.WH.R_QCModel
@{
ViewData["Title"] = "R_QC";
var F = Html.F();
}
@section head {
}
@section body{
<f:Panel ID="Panel1" ShowBorder="false" ShowHeader="false" AutoScroll="true" IsFluid="true" IsViewPort="true">
<Toolbars>
<f:Toolbar ID="Toolbar1" Position="Top" ToolbarAlign="Left">
<Items>
<f:Button ID="btnClose" Icon="SystemClose" Text="关闭">
<Listeners>
<f:Listener Event="click" Handler="F.activeWindow.hide();"></f:Listener>
</Listeners>
</f:Button>
<f:ToolbarSeparator></f:ToolbarSeparator>
<f:Button ID="btnSaveClose" ValidateForms="SimpleForm1" OnClickFields="SimpleForm1" Icon="SystemSaveClose" OnClick="@Url.Handler("BtnSaveClose_Click")" Text="保存后关闭"></f:Button>
<f:ToolbarSeparator></f:ToolbarSeparator>
<f:Button ID="btnFinishClose" ValidateForms="SimpleForm1" OnClickFields="SimpleForm1" IconFont="Check" OnClick="@Url.Handler("BtnSaveClose_Click")" Text="完工关闭"></f:Button>
</Items>
</f:Toolbar>
</Toolbars>
<Items>
<f:Form ID="SimpleForm1" ShowBorder="false" ShowHeader="false" BodyPadding="10" LabelWidth="110">
<Rows>
<f:FormRow>
<Items>
<f:DropDownList For="currentR_QC.SQCID" DataTextField="ChineseName" AutoSelectFirstItem="false" DataSource="@Model.Users"
DataValueField="ID" EmptyText="请选择人员..." EnableEdit="true"></f:DropDownList>
<f:HiddenField ID="currentR_QCID" Text="@Model.currentR_QCID"></f:HiddenField>
<f:HiddenField ID="currentR_QCRProcID" Text="@Model.SelectedNodesID"></f:HiddenField>
</Items>
</f:FormRow>
<f:FormRow>
<Items>
<f:DropDownList For="currentR_QC.QCID" DataTextField="ChineseName" AutoSelectFirstItem="false" DataSource="@Model.Users"
DataValueField="ID" EmptyText="请选择人员..." EnableEdit="true"></f:DropDownList>
</Items>
</f:FormRow>
<f:FormRow>
<Items>
<f:TriggerBox For="currentR_QC.PFinishTime" EmptyText="请选择时间" TriggerIcon="Date" CssClass="dtime"></f:TriggerBox>
</Items>
</f:FormRow>
<f:FormRow>
<Items>
<f:TriggerBox For="currentR_QC.StartTime" EmptyText="请选择时间" TriggerIcon="Date" CssClass="dtime"></f:TriggerBox>
</Items>
</f:FormRow>
<f:FormRow>
<Items>
<f:TriggerBox For="currentR_QC.EndTime" EmptyText="请选择时间" TriggerIcon="Date" CssClass="dtime">
</f:TriggerBox>
</Items>
</f:FormRow>
<f:FormRow>
<Items>
<f:TextBox For="currentR_QC.QCResult"></f:TextBox>
</Items>
</f:FormRow>
<f:FormRow ColumnWidths="100%">
<Items>
<f:FileUpload ID="QCReportContent" Label=检验单上传 AcceptFileTypes="image/*" ButtonIcon="Add" Text="@Model.QCReport"></f:FileUpload>
<f:Button ID="btDelete" Icon="Delete" Text="删除...">
<Menu>
<f:MenuButton ID="rsQCReportContent" Text="重置上传控件" IconFont="Repeat">
<Listeners>
<f:Listener Event="click" Handler="reSetQCReportContent();"></f:Listener>
</Listeners>
</f:MenuButton>
<f:MenuButton ID="mbtDeleteQ" Text="删除" Enabled="@Model.btQCReport" IconFont="Remove">
<Listeners>
<f:Listener Event="click" Handler="reMoveFile('Q');"></f:Listener>
</Listeners>
</f:MenuButton>
</Menu>
</f:Button>
<f:Button ID="btDownloadQCRep" IconFont="Download" Text="下载" Enabled="@Model.btQCReport">
<Listeners>
<f:Listener Event="click" Handler="downLoad('QCReport');"></f:Listener>
</Listeners>
</f:Button>
</Items>
</f:FormRow>
<f:FormRow ColumnWidths="100%">
<Items>
<f:FileUpload ID="PhotoContent" Label="拍照留底" AcceptFileTypes="image/*" ButtonIcon="Add" Text="@Model.Photo"></f:FileUpload>
<f:Button ID="btDelete" Icon="Delete" Text="删除...">
<Menu>
<f:MenuButton ID="rsPhotoContent" Text="重置上传控件" IconFont="Repeat">
<Listeners>
<f:Listener Event="click" Handler="reSetPhotoContent();"></f:Listener>
</Listeners>
</f:MenuButton>
<f:MenuButton ID="mbtDeleteP" Text="删除" Enabled="@Model.btPhoto" IconFont="Remove">
<Listeners>
<f:Listener Event="click" Handler="reMoveFile('P');"></f:Listener>
</Listeners>
</f:MenuButton>
</Menu>
</f:Button>
<f:Button ID="btDownloadPhoto" IconFont="Download" Text="下载" Enabled="@Model.btPhoto">
<Listeners>
<f:Listener Event="click" Handler="downLoad('Photo');" ></f:Listener>
</Listeners>
</f:Button>
</Items>
</f:FormRow>
<f:FormRow>
<Items>
<f:TextArea For="currentR_QC.Remark" AutoGrowHeight="true" EmptyText="最多500字"></f:TextArea>
</Items>
</f:FormRow>
</Rows>
</f:Form>
</Items>
</f:Panel>
}
@section script {
<script src="~/res/third-party/layDate-v5.2.0\laydate\laydate.js" type="text/javascript"></script>
<script>
function reSetPhotoContent() {
var f = F.ui.PhotoContent;
f.reset();
}
function reSetQCReportContent() {
var f = F.ui.QCReportContent;
f.reset();
}
function reMoveFile(actionType) {
F.confirm({
message: '确定删除此文件吗？',
target: '_top',
ok: function () {
// 触发后台事件
F.doPostBack('@Url.Handler("RemoveFile")', 'SimpleForm1',{
actionType: actionType
});
}
});
}
function downLoad(button) {
var id = F.ui.currentR_QCID.value;
window.location.href = '@Url.Content("~/WH/DownLoad?ID=")' + id + "&button=" + button + "&station=R_QC" ;
}
F.ready(function () {
lay('.dtime').each(function () {
laydate.render({
elem: this.getElementsByTagName('input')[0] //this.getElementsByTagName('input')[0] //this.childNodes[1].childNodes[0].childNodes[0] //两种方法均可定位到input元素；
, eventElem: this.getElementsByTagName('i')[0]
, type: 'datetime' //datetime,
, show: false
//, trigger: 'click'
//, closeStop: '#tbxMyBox-inputEl'
, position: 'abolute' //默认值：absolute,绝对定位，始终吸附在绑定元素周围; fixed固定定位，初始吸附在绑定元素周围，不随浏览器滚动条所左右。
, zIndex: 10029
// , theme: 'molv'
, calendar: true
});
});
});
</script>
}
三、数据初始化及上传
1、页面初始化
下载、删除按钮默认不可用；如果记录已存在，上传控件显示文件名，并将下载、删除按钮设置为可用。
public class R_QCModel : BaseAdminModel
{
[BindProperty]
public R_QC currentR_QC { get; set; }
public IEnumerable<User> Users { get; set; } //检验员、送检员下拉列表；
public int SelectedNodesID { get; set; } //选择的工序ID
public int currentR_QCID { get; set; }
public string Photo { get; set; } //文件名称
public string QCReport { get; set; } //文件名称
public bool btPhoto { get; set; } //下载、删除按钮是否启用；
public bool btQCReport { get; set; } //下载、删除按钮是否启用；
private readonly long _fileSizeLimit=299999;
private readonly string[] _permittedExtensions = { ".txt",".png" ,".jpeg", ".jpg",".gif" };
public async Task<IActionResult> OnGetAsync(int proc)
{
//下载、删除按钮默认不可用；
btPhoto = false;
btQCReport = false;
// 如果记录已存在，上传控件显示文件名，并将下载、删除按钮设置为可用；
R_QC _currentR_QC = new R_QC();
_currentR_QC = await DB.R_QC.Include(q => q.SQC).Include(q => q.QC).
Where(p => p.POProcID == proc).FirstOrDefaultAsync();
if (_currentR_QC != null)
{
currentR_QC = _currentR_QC;
QCReport=_currentR_QC.QCReport;
Photo= _currentR_QC.Photo;
currentR_QCID = _currentR_QC.ID;
if (_currentR_QC.QCReportContent!=null)
{
btQCReport = true;
}
if (_currentR_QC.PhotoContent!=null)
{
btPhoto = true;
}
}
SelectedNodesID = proc;
Users = await DB.Users.ToListAsync();
return Page();
}
}
2、数据、文件上传后端代码
public async Task<IActionResult> OnPostBtnSaveClose_ClickAsync(string currentR_QCRProcID, string currentR_QCID, List<IFormFile> QCReportContent,List<IFormFile> PhotoContent)
{
//ModelState.Remove("currentR_QC.ID");
if (ModelState.IsValid)
{
var _r = await DB.R_QC.Include(q => q.SQC).Include(q => q.QC).Where(q=>q.ID== Convert.ToInt32(currentR_QCID)).SingleOrDefaultAsync();
//_r 不为空，则更新；
if (_r != null)
{
if (await TryUpdateModelAsync<R_QC>(_r, "currentR_QC"
,r => r.SQCID
, r => r.QCID
,r=>r.StartTime
,r=>r.EndTime
,r=>r.PFinishTime
,r=>r.QCResult
,r=>r.Remark
)
)
{
//文件
foreach (var formFile in QCReportContent)
{
var formFileContent =
await FileHelpers.ProcessFormFile<BufferedMultipleFileUploadDb>(
formFile, ModelState, _permittedExtensions,
_fileSizeLimit);
//// Perform a second check to catch ProcessFormFile method
//// violations. If any validation check fails, return to the
//// page.
if (!ModelState.IsValid)
{
//Alert.Show( "请上传正确格式的文件！");
return UIHelper.Result();
}
_r.QCReportContent = formFileContent;
_r.QCReport = formFile.FileName;
}
foreach (var formFile in PhotoContent)
{
var formFileContent =
await FileHelpers.ProcessFormFile<BufferedMultipleFileUploadDb>(
formFile, ModelState, _permittedExtensions,
_fileSizeLimit);
if (!ModelState.IsValid)
{
//Alert.Show( "请上传正确格式的文件！");
return UIHelper.Result();
}
_r.PhotoContent = formFileContent;
_r.Photo = formFile.FileName;
}
}
}
else //如果记录不存在，则新增记录；
{
currentR_QC.POProcID = Convert.ToInt32(currentR_QCRProcID);
currentR_QC.OperatorID = (int)GetIdentityID();
currentR_QC.CreateTime = DateTime.Now;
currentR_QC.StatusID = 6;
foreach (var formFile in QCReportContent)
{
var formFileContent =
await FileHelpers.ProcessFormFile<BufferedMultipleFileUploadDb>(
formFile, ModelState, _permittedExtensions,
_fileSizeLimit);
if (!ModelState.IsValid)
{
//Alert.Show( "请上传正确格式的文件！");
return UIHelper.Result();
}
currentR_QC.QCReportContent = formFileContent;
currentR_QC.QCReport = formFile.FileName;
}
foreach (var formFile in PhotoContent)
{
var formFileContent =
await FileHelpers.ProcessFormFile<BufferedMultipleFileUploadDb>(
formFile, ModelState, _permittedExtensions,
_fileSizeLimit);
if (!ModelState.IsValid)
{
//Alert.Show( "请上传正确格式的文件！");
return UIHelper.Result();
}
currentR_QC.PhotoContent = formFileContent;
currentR_QC.Photo = formFile.FileName;
}
DB.R_QC.Add(currentR_QC);
}
await DB.SaveChangesAsync();
// 关闭本窗体（触发窗体的关闭事件）
ActiveWindow.HidePostBack();
}
return UIHelper.Result();
}
public class BufferedMultipleFileUploadDb
{
[Required]
[Display(Name = "File")]
public List<IFormFile> FormFiles { get; set; }
[Display(Name = "Note")]
[StringLength(50, MinimumLength = 0)]
public string Note { get; set; }
}
四、文件下载及文件删除
1、文件下载后端代码
文件下载，采用跳转页面方式进行。
- 创建下载页面，页面名称：Download.cshtml
@page
@model XXX.Pages.WH.DownloadModel
@section body{
<h2>下载出错，文件不存在或已被删除！</h2>
}
public class DownloadModel : BaseAdminModel
{
public async Task<IActionResult> OnGetAsync(int ID,string station,string button)
{
if (ID != 0)
{
if (station == "R_QC")
{
var requestFile = await DB.R_QC.SingleOrDefaultAsync(q => q.ID == ID);
if (requestFile == null)
{
return Page();
}
if (button == "Photo")
{
if (requestFile.PhotoContent == null)
{
return Page();
}
return File(requestFile.PhotoContent, MediaTypeNames.Application.Octet, requestFile.Photo);
}
if (button == "QCReport")
{
if (requestFile.QCReportContent == null)
{
return Page();
}
return File(requestFile.QCReportContent, MediaTypeNames.Application.Octet, requestFile.QCReport);
}
}
else if (button == "R_QC_Photo")
{
}
}
return Page();
}
}
- 执行下载
2、文件删除后端代码
//删除已上传的文件
public async Task<IActionResult>OnPostRemoveFileAsync(string actionType,string currentR_QCID)
{
var _r = await DB.R_QC.Where(p => p.ID == Convert.ToInt32(currentR_QCID)).SingleOrDefaultAsync();
if (_r == null)
{
Alert.Show("文件已删除！");
return UIHelper.Result();
}
if (actionType == "Q")
{
_r.QCReportContent = null;
_r.QCReport = null;
//更新前端控件
UIHelper.FileUpload("QCReportContent").Text("");
UIHelper.Button("btDownloadQCRep").Enabled(false);
UIHelper.MenuButton("mbtDeleteQ").Enabled(false);
}
if (actionType == "P")
{
_r.PhotoContent = null;
_r.Photo = null;
//更新前端控件
UIHelper.FileUpload("PhotoContent").Text("");
UIHelper.Button("btDownloadPhoto").Enabled(false);
UIHelper.MenuButton("mbtDeleteP").Enabled(false);
}
await DB.SaveChangesAsync();
return UIHelper.Result();
}
以上是本文全部内容。
标签：set,get,数据库,传到,QC,上传,public,下载,currentR 来源： https://www.cnblogs.com/lucky-sebill/p/14722758.html