asp.net 在Blazor组件中创建类的示例并使用其方法的过程是什么?

qjp7pelc  于 2023-06-25  发布在  .NET
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关于Blazor服务,我的应用程序中有一个名为Logo-builder.razor的组件。

@page "/logo-builder"
@using BlazorApp_AI_1.Data
@inject LogoBuiderService logoBuilderService

<h1>Logo Builder</h1>

<label for="text-input">Text:</label>
<input type="text" id="text-input" @bind-value="@LogoText" />
<label for="color-picker">Color:</label>
<input type="color" id="color-picker" @bind-value="@LogoColor" />

<button @onclick="GenerateLogo">Generate Logo</button>

@if (LogoImage != null)
{
    <img src="@LogoImage" alt="Generated Logo" />
}

@code{
}

LogoBuilderService.cs:
以下是这个类的一些部分:

public string GenerateLogo(string text, string color)
{
    // Convert the color string to a Color object
    var colorObj = ColorTranslator.FromHtml(color);

    // Create a new LogoInput object with the user inputs
    var input = new LogoInput { Text = text, Color = colorObj };

    // Feed the LogoInput object to the prediction engine to generate a LogoOutput object
    var output = predictionEngine.Predict(input);

    // Create a new bitmap with the width and height of the generated logo
    var bitmap = new Bitmap(output.Width, output.Height);

    // Create a new Graphics object to draw on the bitmap
    var graphics = Graphics.FromImage(bitmap);

    // Set the background color of the bitmap
    graphics.Clear(output.BackgroundColor);

    // Draw the text on the bitmap using the font name, font size, font color, and positioning from the LogoOutput object
    graphics.DrawString(text, new Font(output.FontName, output.FontSize), new SolidBrush(output.FontColor), new PointF(output.X, output.Y));

    // Convert the bitmap to a PNG image and write it to a memory stream
    var stream = new MemoryStream();
    bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
    stream.Seek(0, SeekOrigin.Begin);

    // Convert the memory stream to a base64-encoded string and return it
    return $"data:image/png;base64,{Convert.ToBase64String(stream.ToArray())}";
}

我已在Program.cs文件中注册LogoBuilder.cs文件。

builder.Services.AddSingleton<LogoBuiderService>();

builder.Services.AddScoped<LogoBuiderService>();

如何在组件中示例化LogoBuilder.cs并使用GenerateLogo方法?
我想在我的组件中使用此服务类。示例化应该如何?

yacmzcpb

yacmzcpb1#

我认为你可以这样使用:

@page "/logo-builder"
@using BlazorApp_AI_1.Data
@inject LogoBuilderService logoBuilderService

<h1>Logo Builder</h1>

<label for="text-input">Text:</label>
<input type="text" id="text-input" @bind="@LogoText" />
<label for="color-picker">Color:</label>
<input type="color" id="color-picker" @bind="@LogoColor" />

<button @onclick="GenerateLogo">Generate Logo</button>

@if (!string.IsNullOrEmpty(LogoImage))
{
    <img src="@LogoImage" alt="Generated Logo" />
}

@code {
    private string LogoText;
    private string LogoColor;
    private string LogoImage;

    private async Task GenerateLogo()
    {
        LogoImage = logoBuilderService.GenerateLogo(LogoText, LogoColor);
    }
}

如果你能让GenerateLogo返回一个Task<string>来允许异步操作,也许会更好。

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