因此，在项目的private void btn_Insert_Click(object sender, EventArgs e)
{
if (txt_StudentFirstName.Text != "" &&
txt_StudentMobileNo.Text != "" &&
cmb_Teacher.Text != "" &&
img_Box.Image != null)
{
byte[] img = null;
FileStream fs = new FileStream(imgLoc, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
img = br.ReadBytes((int)fs.Length);
cmd = new OleDbCommand("INSERT INTO Student (FirstName, LastName, FatherName, FatherID, DOB,
DOR, Class, Course, Gender, Teacher, Address,
EmailID, MobileNo, TotalFee, FeePaid, Balance, Image)
VALUES (@FirstName, @LastName, @FatherName, @FatherID, @DOB,
@DOR, @Class, @Course, @Gender, @Teacher, @Address,
@EmailID, @MobileNo, @TotalFee, @FeePaid, @Balance, @Img)", con);
con.Open();
cmd.Parameters.AddWithValue("@FirstName", txt_StudentFirstName.Text);
cmd.Parameters.AddWithValue("@LastName", txt_StudentLastName.Text);
cmd.Parameters.AddWithValue("@FatherName", txt_StudentFatherName.Text);
cmd.Parameters.AddWithValue("@FatherID", txt_StudentFatherID.Text);
cmd.Parameters.AddWithValue("@DOB", Student_DOB.Text);
cmd.Parameters.AddWithValue("@DOR", Student_DOR.Text);
cmd.Parameters.AddWithValue("@Class", cmb_Class.Text);
cmd.Parameters.AddWithValue("@Course", cmb_Course.Text);
cmd.Parameters.AddWithValue("@Gender", cmb_Gender.Text);
cmd.Parameters.AddWithValue("@Teacher", cmb_Teacher.Text);
cmd.Parameters.AddWithValue("@Address", txt_StudentAddress.Text);
cmd.Parameters.AddWithValue("@EmailID", txt_StudentEmailID.Text);
cmd.Parameters.AddWithValue("@MobileNo", txt_StudentMobileNo.Text);
cmd.Parameters.AddWithValue("@TotalFee", cmb_CourseFee.Text);
cmd.Parameters.AddWithValue("@FeePaid", txt_FeePaid.Text);
cmd.Parameters.AddWithValue("@Balance", txt_Balance.Text);
// byte[] yourPhoto = ();
cmd.Parameters.AddWithValue("@Img", img);
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("Record inserted successfully");
DisplayData();
ClearData();
}
else
{
MessageBox.Show("Please provide complete details with image !");
}
}
文件中，您可以像这样创建一个窗口（然后从那里开始）：
main.swift我想知道如何用金属三角形做同样的事情。我一直在浏览github.com/topics/metalkit，但到目前为止，我所发现的最接近的东西不在gist中。
let nsapp = NSApplication.shared
let window = NSWindow(
contentRect: NSMakeRect(0, 0, 200, 200),
styleMask: .fullSizeContentView,
backing: NSWindow.BackingStoreType.buffered,
defer: false
)
window.cascadeTopLeft(from:NSMakePoint(20,20))
nsapp.run()
它至少从头开始构建import Cocoa
import MetalKit
@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate, MTKViewDelegate {
weak var window: NSWindow!
weak var metalView: MTKView!
let device = MTLCreateSystemDefaultDevice()!
var commandQueue: MTLCommandQueue!
var pipelineState: MTLRenderPipelineState!
func applicationDidFinishLaunching(_ aNotification: Notification) {
metalView = MTKView(frame: NSRect(origin: CGPoint.zero, size: window.frame.size), device: device)
metalView.delegate = self
window.contentView = metalView
commandQueue = device.makeCommandQueue()
let shaders = """
#include <metal_stdlib>
using namespace metal;
struct VertexIn {
packed_float3 position;
packed_float3 color;
};
struct VertexOut {
float4 position [[position]];
float4 color;
};
vertex VertexOut vertex_main(device const VertexIn *vertices [[buffer(0)]],
uint vertexId [[vertex_id]]) {
VertexOut out;
out.position = float4(vertices[vertexId].position, 1);
out.color = float4(vertices[vertexId].color, 1);
return out;
}
fragment float4 fragment_main(VertexOut in [[stage_in]]) {
return in.color;
}
"""
do {
let library = try device.makeLibrary(source: shaders, options: nil)
let pipelineDescriptor = MTLRenderPipelineDescriptor()
pipelineDescriptor.colorAttachments[0].pixelFormat = metalView.colorPixelFormat
pipelineDescriptor.vertexFunction = library.makeFunction(name: "vertex_main")
pipelineDescriptor.fragmentFunction = library.makeFunction(name: "fragment_main")
pipelineState = try device.makeRenderPipelineState(descriptor: pipelineDescriptor)
} catch {}
}
func mtkView(_ view: MTKView, drawableSizeWillChange size: CGSize) {
}
func draw(in view: MTKView) {
guard let commandBuffer = commandQueue.makeCommandBuffer() else { return }
guard let passDescriptor = view.currentRenderPassDescriptor else { return }
guard let encoder = commandBuffer.makeRenderCommandEncoder(descriptor: passDescriptor) else { return }
let vertexData: [Float] = [ -0.5, -0.5, 0, 1, 0, 0,
0.5, -0.5, 0, 0, 1, 0,
0, 0.5, 0, 0, 0, 1 ]
encoder.setVertexBytes(vertexData, length: vertexData.count * MemoryLayout<Float>.stride, index: 0)
encoder.setRenderPipelineState(pipelineState)
encoder.drawPrimitives(type: .triangle, vertexStart: 0, vertexCount: 3)
encoder.endEncoding()
commandBuffer.present(view.currentDrawable!)
commandBuffer.commit()
}
}
。但是，我不确定没有任何控制器，代表，应用程序的情况下，使金属事物正常工作的最低可行产品是什么，我将开始进行反复试验以使其正常工作，但是可能要花几天时间，并认为如果有人已经知道了这一点，对其他人可能会有帮助。
我将两者结合了起来，但我无法说清。
MTKView对我来说是空白。我也尝试遵循this。
This越来越近了。
答案 0 :(得分：1)
这里的主要问题是NSApplication的{{1}}方法在应用终止之前不会返回，因此您的渲染命令编码永远不会发生。您可以继承run的子类并覆盖其MTKView的方法来绘制图形：
draw