我是一名.NET學生,試圖學習如何從數據庫中獲取圖像(varbinary(MAX))並將其轉換爲圖像文件。我已成功設法將圖像轉換爲byte []並將其保存到數據庫。這是到目前爲止我的代碼試圖讓圖像回:從字節創建圖像[]
public IActionResult Index()
{
var kund = DbContext.Kunder.SingleOrDefault(p => p.KundId == 2);
byte[] byteImage = kund.Bild;
Image image = byteArrayToImage(byteImage);
return View();
}
public Image byteArrayToImage(byte[] byteArrayIn)
{
MemoryStream ms = new MemoryStream(byteArrayIn);
Image returnImage = Image.FromStream(ms);
return returnImage;
}
我有我所知道的問題之一是,Visul Studio正在講述這件事:
嚴重性代碼說明項目文件的線路抑制狀態 錯誤CS0117'圖像'不包含 的定義'FromStream'ImageToDB..NETCoreApp,Version = v1.0 D:\ Kay \ ASP.NET MVC \ ImageToDatabase \ ImageToDB \ src \ ImageToDB \ Controllers \ HomeController.cs 40 Active
這是從命名空間System.Drawing中的圖像類(不是我自己的類):
namespace System.Drawing
{
public abstract class Image
{
protected Image();
solution
public delegate bool GetThumbnailImageAbort();
}
}
我的依賴關係:
{
"dependencies": {
"Microsoft.NETCore.App": {
"version": "1.0.1",
"type": "platform"
},
"Microsoft.AspNetCore.Diagnostics": "1.0.0",
"Microsoft.AspNetCore.Mvc": "1.0.1",
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview2-final",
"type": "build"
},
"Microsoft.AspNetCore.Routing": "1.0.1",
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
"Microsoft.AspNetCore.StaticFiles": "1.0.0",
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
"Microsoft.Extensions.Configuration.Json": "1.0.0",
"Microsoft.Extensions.Logging": "1.1.0",
"Microsoft.Extensions.Logging.Console": "1.0.0",
"Microsoft.Extensions.Logging.Debug": "1.0.0",
"Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
"Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0",
"Microsoft.EntityFrameworkCore": "1.1.0",
"Microsoft.EntityFrameworkCore.SqlServer": "1.1.0",
"Microsoft.EntityFrameworkCore.Tools": "1.1.0-preview4-final",
},
"tools": {
"BundlerMinifier.Core": "2.0.238",
"Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
"Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final"
},
"frameworks": {
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"portable-net45+win8"
]
}
},
當我看到不同勢的例子在網絡上我經常看到這解決方案,但是當我嘗試使用它時,FromStream會呈現紅色的波浪狀。
告訴我,如果還有什麼更多的,你想從我的代碼中看到,我會帶上它。
在此先感謝所有的幫助
當你說「這是Image類」 - 你的意思是你已經創建了自己的圖像類?如果是這樣,不要這樣做......如果沒有,請澄清。 (另外,請說明你的.NET版本是什麼,看起來像是.NET Core,但是哪個版本?) –
對不起。我沒有創建這個類。將澄清 – AllramEst
可能重複的[轉換字符圖像在C銳淨](http://stackoverflow.com/questions/2623198/convert-bytes-to-image-in-c-sharp-net) –