WinForms：如何获取触发事件的按钮名称用于文本文件保存

核心思路 #

通过在Form类中添加一个类级字段，记录用户最后点击的Preset按钮名称，后续保存操作直接读取该字段即可定位目标文件。

具体修改步骤 #

1. 添加类级字段记录当前预设

在fmMain类的顶部添加私有字段，用于存储最后点击的Preset按钮名称：

private string _currentPresetName;

2. 在预设按钮点击事件中更新字段

修改btnPreset_Click方法，加载文件时同步记录当前按钮的名称：

private void btnPreset_Click(object sender, EventArgs e)
{
    string path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + @"\ShirohanaAi\ShirohanaPresets";
    if (!Directory.Exists(path))
    {
        Directory.CreateDirectory(path);
    }

    Button btn = (Button)sender;
    // 记录当前选中的预设按钮名称
    _currentPresetName = btn.Name;

    string textFile = path + @"\"+ btn.Name + ".txt";

    if (File.Exists(textFile))
    {
        string[] line = File.ReadAllLines(textFile);
        rtbPrompt.Text = line[0];
        rtbNegative.Text = line[1];
    }
    else
    {
        MissingPresetError();
    }
}

3. 在保存按钮事件中使用记录的预设名称

修改btnSave_Click方法，读取记录的预设名称构建文件路径，并处理未选中预设的边界情况：

private void btnSave_Click(object sender, EventArgs e)
{
    // 检查是否已选中预设
    if (string.IsNullOrEmpty(_currentPresetName))
    {
        MessageBox.Show("请先选择一个预设按钮！", "未选择预设");
        return;
    }

    string path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + @"\ShirohanaAi\ShirohanaPresets";
    string textFile = path + @"\" + _currentPresetName + ".txt";

    // 将编辑后的内容写入对应文件
    using (StreamWriter sw = File.CreateText(textFile))
    {
        sw.WriteLine(rtbPrompt.Text);
        sw.WriteLine(rtbNegative.Text);
    }

    MessageBox.Show("保存成功！", "提示");
}

4. 移除无用代码

原代码中btnGetID方法无实际作用，直接删除该方法，并在CreateButtons方法中移除对应的事件绑定：

// 删除这一行事件绑定
// newButton.Click += new EventHandler(btnGetID);

修改后的完整代码 #

using System;
using System.IO;
using System.Windows.Forms;

namespace Shirohana
{
    public partial class fmMain : Form
    {
        // 记录当前选中的预设按钮名称
        private string _currentPresetName;

        public fmMain()
        {
            InitializeComponent();
        }

        public async void WaitSomeTime(Form item)
        {
            await Task.Delay(3000);
            item.Close();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // Set up the prompt text box
            int xPrompt, yPrompt;

            rtbPrompt.Font = lblPrompt.Font;

            pnlPrompt.Width    = rtbPrompt.Width  + 10;
            pnlPrompt.Height   = rtbPrompt.Height + 10;

            xPrompt            = rtbPrompt.Location.X;
            yPrompt            = rtbPrompt.Location.Y;

            pnlPrompt.Location = new Point(xPrompt-5,yPrompt-5);
            lblPrompt.Location = new Point(xPrompt-5,yPrompt-lblPrompt.Height-5);

            int xNegative, yNegative;

            rtbNegative.Font   = lblPrompt.Font;

            pnlNegative.Width  = rtbNegative.Width  + 10;
            pnlNegative.Height = rtbNegative.Height + 10;

            xNegative          = rtbNegative.Location.X;
            yNegative          = rtbNegative.Location.Y;

            pnlNegative.Location = new Point(xNegative - 5, yNegative - 5);
            lblNegative.Location = new Point(xNegative - 5, yNegative - lblNegative.Height - 5);

            CreateButtons();
        }

        public void MissingPresetError()
        {
            MessageBox.Show("Please make sure Preset text file exists and is placed in the ShirohanaPresets folder.", "Preset File Missing!");
        }

        public void CreateButtons()
        {
            string fpath   = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + @"\ShirohanaAi\ShirohanaPresets";
            int FileNumber = 1;
            int fileCount = 20-1;
            for (int i = 0; i < fileCount; i++)
            {
                FileNumber++;
                Button newButton = new Button();
                this.Controls.Add(newButton);
                newButton.Text                      = "PST "+FileNumber;
                newButton.Size                      = new Size(105, 50);
                newButton.Font                      = Preset1.Font;
                newButton.FlatStyle                 = FlatStyle.Flat;
                newButton.FlatAppearance.BorderSize = 0;
                newButton.BackColor                 = ColorTranslator.FromHtml("206, 100, 0");
                newButton.ForeColor                 = ColorTranslator.FromHtml("251, 248, 248");
                newButton.Margin                    = new Padding(8, 8, 8, 8);
                newButton.Name                      = "Preset"+FileNumber;
                newButton.Click += new EventHandler(btnPreset_Click);

                pnlPresets.Controls.Add(newButton);

                string create_path = fpath + @"\Preset" + FileNumber + ".txt";
                if (!File.Exists(create_path))
                {
                    using (StreamWriter sw = File.CreateText(create_path))
                    {
                        sw.WriteLine("PROMPT HERE - PRESET "+FileNumber);
                        sw.WriteLine("NEGATIVE HERE");
                    }
                }
            }
        }

        private void btnPreset_Click(object sender, EventArgs e)
        {
            string path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + @"\ShirohanaAi\ShirohanaPresets";
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }

            Button btn = (Button)sender;
            _currentPresetName = btn.Name;

            string textFile = path + @"\"+ btn.Name + ".txt";

            if (File.Exists(textFile))
            {
                string[] line = File.ReadAllLines(textFile);
                rtbPrompt.Text = line[0];
                rtbNegative.Text = line[1];
            }
            else
            {
                MissingPresetError();
            }
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(_currentPresetName))
            {
                MessageBox.Show("请先选择一个预设按钮！", "未选择预设");
                return;
            }

            string path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + @"\ShirohanaAi\ShirohanaPresets";
            string textFile = path + @"\" + _currentPresetName + ".txt";

            using (StreamWriter sw = File.CreateText(textFile))
            {
                sw.WriteLine(rtbPrompt.Text);
                sw.WriteLine(rtbNegative.Text);
            }

            MessageBox.Show("保存成功！", "提示");
        }

        #region Copy Buttons
        private void btnCopyPrompt_Click(object sender, EventArgs e)
        {
            if (rtbPrompt.Text != "")
            { 
                System.Windows.Forms.Clipboard.SetText(rtbPrompt.Text);
                new ToolTip().Show("Copied Prompt Info!",this, rtbPrompt.Location.X + 100 , rtbPrompt.Location.Y, 1000);
            }
            else
            {
                new ToolTip().Show("Empty!", this, rtbPrompt.Location.X + 100, rtbPrompt.Location.Y, 1000);
            }
        }

        private void btnCopyNegative_Click(object sender, EventArgs e)
        {
            if (rtbNegative.Text != "")
            {
                System.Windows.Forms.Clipboard.SetText(rtbNegative.Text);
                new ToolTip().Show("Copied Negative Prompt Info!",this, rtbNegative.Location.X + 170, rtbNegative.Location.Y, 1000);
            }
            else
            {
                new ToolTip().Show("Empty!", this, rtbNegative.Location.X + 170, rtbNegative.Location.Y, 1000);
            }
        }
        #endregion
    }
}

内容的提问来源于stack exchange，提问作者ShirohanaAi