添加项目文件。

WPFWCSDemo/ViewModels/LogViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection.Metadata;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Controls;
+using System.Windows;
+using CommunityToolkit.Mvvm.ComponentModel;
+using System.Reactive.Linq;
+using System.Diagnostics;
+using System.Threading;
+
+namespace WPFWCSDemo.ViewModels
+{
+    public partial class LogViewModel : ObservableObject
+    {
+        public LogViewModel()
+        {
+            //更新（当日）日志
+            //Task.Run(() =>
+            //{
+
+            //    while (true)
+            //    {
+            //        try
+            //        {
+            //            //获取存储日志的字符串
+            //            Content = File.ReadAllText(dirPath + @"logs\2024-10-09\Debug.txt");
+
+            //            Task.Delay(1000);
+            //        }
+            //        catch (Exception)
+            //        {
+
+            //        }
+
+            //    }
+            //});
+
+        }
+
+
+        //存放日志文件路径
+        //readonly string dirPath = @"E:\VSProject\WPF\FT472\WPFWCSDemo\bin\Debug\net6.0-windows\";
+
+        //[ObservableProperty]
+        //string _content;
+
+
+        /*
+            #region 下拉框内容初始化
+            //月份选择下拉框
+            cbxMonth.Items.Clear();
+            cbxMonth.Items.Add("-请选择月份-");
+            cbxMonth.Items.Add("一月");
+            cbxMonth.Items.Add("二月");
+            cbxMonth.Items.Add("三月");
+            cbxMonth.Items.Add("四月");
+            cbxMonth.Items.Add("五月");
+            cbxMonth.Items.Add("六月");
+            cbxMonth.Items.Add("七月");
+            cbxMonth.Items.Add("八月");
+            cbxMonth.Items.Add("九月");
+            cbxMonth.Items.Add("十月");
+            cbxMonth.Items.Add("十一月");
+            cbxMonth.Items.Add("十二月");
+
+            //下拉框选择初始化
+            cbxMonth.SelectedIndex = 0;
+            cbxLogName.SelectedIndex = 0;
+
+            #endregion
+
+        }
+
+        /// <summary>
+        /// 实时日志【内容更新】事件触发
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void txtLog_TextChanged(object sender, EventArgs e)
+        {
+            //【搜索】按钮打开当天日志时，令滚动条位于最下
+            txtLog.SelectionStart = txtLog.Text.Length;
+            txtLog.ScrollToCaret();
+        }
+
+
+        /// <summary>
+        /// 【月份】下拉框的值改变事件--→【日志】名称选择的下拉框也随之变化
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void cbxMonth_TextChanged(object sender, EventArgs e)
+        {
+            //日志文件名选择下拉框
+            cbxLogName.Items.Clear();
+            //获取存放日志文件夹所有文件全路径
+            try
+            {
+                //尝试获取路径，否则报错
+                string[] name = Directory.GetDirectories(dirPath);
+                //添加到下拉框
+                cbxLogName.Items.Add("-请选择日志-");
+                for (int i = 0; i < name.Length; i++)
+                {
+                    //从文件名筛选符合月份条件的项
+                    if (Path.GetFileNameWithoutExtension(name[i]).Contains("-" + cbxMonth.SelectedIndex.ToString("00") + "-"))
+                    {
+                        //添加当月日志的文件名
+                        cbxLogName.Items.Add(Path.GetFileNameWithoutExtension(name[i]));
+                    }
+
+                }
+                cbxLogName.SelectedIndex = 0;
+            }
+            catch (Exception)
+            {
+                return;
+            }
+        }
+
+
+        /// <summary>
+        /// 【搜索】按钮
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void btnSearch_Click(object sender, EventArgs e)
+        {
+            if (cbxMonth.SelectedIndex != 0 && cbxLogName.SelectedIndex == 0)
+            {
+                MessageBox.Show("请选择要查找历史日志的时间！");
+                return;
+            }
+            if (cbxMonth.SelectedIndex == 0 && cbxLogName.SelectedIndex == 0) return;
+            try
+            {
+                //判断选择的日志文件日期是否为当天
+                if (cbxLogName.Text.Equals(DateTime.Now.ToString("yyyy-MM-dd")))
+                {
+                    //显示实时日志
+                    txtLog.Visible = true;
+                }
+                else
+                {
+                    if (cbxMonth.SelectedIndex == 0 && cbxLogName.SelectedIndex == 0) return;
+                    //获取选中的路径文件内容
+                    txtLogHistory.Text = File.ReadAllText(dirPath + cbxLogName.Text + @"/Info.log", Encoding.Default);
+                    //隐藏实时日志---显示历史日志
+                    txtLog.Visible = false;
+                }
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message);
+                return;
+            }
+
+        }
+
+
+        /// <summary>
+        /// 【取消/刷新】页面按钮
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void btnCancel_Click(object sender, EventArgs e)
+        {
+            //【搜索】按钮打开当天日志时，令滚动条位于最下，相比根据【内容更新】事件触发此效果可能存在的时间间隔有观感提升
+            txtLog.SelectionStart = txtLog.Text.Length;
+            txtLog.ScrollToCaret();
+            //显示实时日志
+            txtLog.Visible = true;
+        }
+
+
+        /// <summary>
+        /// 打开当日的日志文档
+        /// </summary>
+        /// <param name="sender"></param>
+        /// <param name="e"></param>
+        private void btnOpenFile_Click(object sender, EventArgs e)
+        {
+            //打开当日的日志文档
+            //Process.Start("notepad", dirPath + DateTime.Now.ToString("yyyy-MM-dd") + "/Info.log");
+            if (Directory.Exists(dirPath + DateTime.Now.ToString("yyyy-MM-dd")))
+            {
+                Process.Start(dirPath + DateTime.Now.ToString("yyyy-MM-dd"));
+            }
+            else
+            {
+                Process.Start(dirPath);
+            }
+        }
+        */
+
+    }
+}