FileUpload
TsgcHTMLComponent_FileUpload — 渲染一个拖放式文件上传区域，以 multipart/form-data 形式提交文件，适用于 Delphi、C++ Builder 和 .NET。
TsgcHTMLComponent_FileUpload — 渲染一个拖放式文件上传区域，以 multipart/form-data 形式提交文件，适用于 Delphi、C++ Builder 和 .NET。
一个上传组件，发出带有样式化拖放区、文件输入框和提交按钮的 Bootstrap <form>，外加其自身的作用域 CSS。设置操作和限制，然后读取 HTML 属性。
TsgcHTMLComponent_FileUpload
Bootstrap 5 表单 + 作用域拖放区 CSS
Delphi, C++ Builder, .NET
设置 Action、Accept 和拖放区文本，然后读取 HTML（或将其放入 TsgcHTMLTemplate_Bootstrap 页面）。
uses
sgcHTML_Enums, sgcHTML_Component_FileUpload;
var
oUpload: TsgcHTMLComponent_FileUpload;
begin
oUpload := TsgcHTMLComponent_FileUpload.Create(nil);
try
oUpload.Action := '/api/upload';
oUpload.Accept := 'image/*';
oUpload.MaxSize := '5 MB';
oUpload.Multiple := True;
oUpload.DragDropEnabled := True;
oUpload.ButtonText := 'Upload files';
oUpload.ButtonStyle := bsPrimary;
WebModule.Response := oUpload.HTML; // <form> drop zone + scoped CSS
finally
oUpload.Free;
end;
end;// includes: sgcHTML_Enums.hpp, sgcHTML_Component_FileUpload.hpp
TsgcHTMLComponent_FileUpload *oUpload = new TsgcHTMLComponent_FileUpload(NULL);
try
{
oUpload->Action = "/api/upload";
oUpload->Accept = "image/*";
oUpload->MaxSize = "5 MB";
oUpload->Multiple = true;
oUpload->DragDropEnabled = true;
oUpload->ButtonText = "Upload files";
oUpload->ButtonStyle = bsPrimary;
String html = oUpload->HTML; // <form> drop zone + scoped CSS
}
__finally
{
delete oUpload;
}using esegece.sgcWebSockets;
var upload = new TsgcHTMLComponent_FileUpload();
upload.Action = "/api/upload";
upload.Accept = "image/*";
upload.MaxSize = "5 MB";
upload.Multiple = true;
upload.DragDropEnabled = true;
upload.ButtonText = "Upload files";
upload.ButtonStyle = TsgcHTMLButtonStyle.bsPrimary;
string html = upload.HTML; // <form> drop zone + scoped CSS您最常使用的成员。
Action 设置 POST 端点；InputName 为文件字段命名；该表单始终以 multipart/form-data 形式提交。
Accept 过滤允许的文件类型；MaxSize 显示大小限制提示；Multiple 让用户一次选择多个文件。
DragDropEnabled 切换样式化拖放区域；Title、Subtitle 和 ButtonText 设置其文案。
IconHTML 设置区域图标；ButtonStyle（TsgcHTMLButtonStyle，如 bsPrimary）为提交按钮设置样式。
HTML 返回上传 <form>，CSS 返回作用域 .sgc-upload-zone 样式 — 页面模板会同时发出两者。
继承的 Section、ColumnWidth 和 RowGroup 将上传器放置在 TsgcHTMLPageBuilder 网格上。