我正在使用Visual Studio 2019，Blazor App，Blazor Server App，Asp.netCore 3.0。
在这种情况下，我正在使用2个模型（模型规和模型部门）和2个不同的数据库（具有数据库校准的模型规和具有数据库Erp的模型部门）。
我是用Model Gage创建的，并试图从Model Department的Select-box检索数据。
模型规
class VideoStream
{
private $path = "";
private $stream = "";
private $buffer = 102400;
private $start = -1;
private $end = -1;
private $size = 0;
function __construct($filePath)
{
$this->path = $filePath;
}
/**
* Open stream
*/
private function open()
{
if (!($this->stream = fopen($this->path,'rb'))) {
die('Could not open stream for reading');
}
}
/**
* Set proper header to serve the video content
*/
private function setHeader()
{
ob_get_clean();
header("Content-Type: video/mp4");
header("Cache-Control: max-age=2592000,public");
header("Expires: " . gmdate('D,d M Y H:i:s',time() + 2592000) . ' GMT');
header("Last-Modified: " . gmdate('D,@filemtime($this->path)) . ' GMT');
$this->start = 0;
$this->size = filesize($this->path);
$this->end = $this->size - 1;
header("accept-Ranges: 0-" . $this->end);
if (isset($_SERVER['HTTP_RANGE'])) {
$c_start = $this->start;
$c_end = $this->end;
list(,$range) = explode('=',$_SERVER['HTTP_RANGE'],2);
if (strpos($range,',') !== false) {
header('HTTP/1.1 416 Requested Range Not Satisfiable');
header("Content-Range: bytes $this->start-$this->end/$this->size");
exit;
}
if ($range == '-') {
$c_start = $this->size - substr($range,1);
} else {
$range = explode('-',$range);
$c_start = $range[0];
$c_end = (isset($range[1]) && is_numeric($range[1])) ? $range[1] : $c_end;
}
$c_end = ($c_end > $this->end) ? $this->end : $c_end;
if ($c_start > $c_end || $c_start > $this->size - 1 || $c_end >= $this->size) {
header('HTTP/1.1 416 Requested Range Not Satisfiable');
header("Content-Range: bytes $this->start-$this->end/$this->size");
exit;
}
$this->start = $c_start;
$this->end = $c_end;
$length = $this->end - $this->start + 1;
fseek($this->stream,$this->start);
header('HTTP/1.1 206 Partial Content');
header("Content-Length: " . $length);
header("Content-Range: bytes $this->start-$this->end/" . $this->size);
} else {
header("Content-Length: " . $this->size);
}
}
/**
* close curretly opened stream
*/
private function end()
{
fclose($this->stream);
exit;
}
/**
* perform the streaming of calculated range
*/
private function stream()
{
$i = $this->start;
set_time_limit(0);
while (!feof($this->stream) && $i <= $this->end) {
$bytesToRead = $this->buffer;
if (($i + $bytesToRead) > $this->end) {
$bytesToRead = $this->end - $i + 1;
}
$data = fread($this->stream,$bytesToRead);
echo $data;
flush();
$i += $bytesToRead;
}
}
/**
* Start streaming video content
*/
function start()
{
$this->open();
$this->setHeader();
$this->stream();
$this->end();
}
}
为此，我正在使用CalibrationDbContext
GageService的代码示例
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
namespace Calibration.Data.Gage
{
public partial class GageMaster
{
public long Id { get; set; }
[Required]
public string Department { get; set; }
[Required]
public string Section { get; set; }
[Required]
public string ControlNo { get; set; }
public Task<List<GageMaster>>
GetGageAsync(string strCurrentUser)
{
List<GageMaster> NwDset =
new List<GageMaster>();
// Get Weather Forecasts
NwDset =
(from Dset in _context.GageMaster
where Dset.IsObsolete != "Yes"
select Dset).ToList();
return Task.FromResult(NwDset);
}
为此，我正在使用ERPDbContext
ErpService的代码示例
using System;
using System.Collections.Generic;
namespace Calibration.Data.ERP
{
public partial class Department
{
public string Departmentcode { get; set; }
public string Departmentname { get; set; }
public string Office { get; set; }
}
Razorcomponent示例代码
public Task<List<Department>>
GetDepartmentAsync()
{
List<Department> NwDset =
new List<Department>();
// Get Weather Forecasts
NwDset =
(from Dset in _context.Department
where Dset.Office == "P"
//strCurrentUser
select Dset).ToList();
return Task.FromResult(NwDset);
}
我想用Inputselect代替Department Inputtext，在razorcomponentpage上仍然可以访问2服务吗？ 我试过继承两个模型 @Inherits不允许一个以上的类。
我对Gageservice没问题。
我试图从ErpService调用此“ GetDepartmentAsync”，但实际上我不知道这种方式。请帮忙。
