实现Excel合并工具功能

- 添加EPPlus NuGet包用于Excel文件处理
- 设计完整的UI界面（文件夹选择、按钮、进度条、日志显示）
- 实现Excel文件合并核心逻辑，支持多个xlsx文件合并
- 添加错误处理和进度跟踪功能
- 提供用户友好的操作界面和提示信息

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

WinFormsApp1/Form1.Designer.cs

@@ -29,11 +29,142 @@
         private void InitializeComponent()
         {
             components = new System.ComponentModel.Container();
+
+            // 主窗体设置
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(800, 450);
+            ClientSize = new Size(600, 400);
-            Text = "Form1";
+            Text = "Excel合并工具";
+            StartPosition = FormStartPosition.CenterScreen;
+
+            // 创建控件
+            grpSourceFolder = new GroupBox();
+            lblSourcePath = new Label();
+            txtSourcePath = new TextBox();
+            btnBrowseSource = new Button();
+
+            grpOutputFolder = new GroupBox();
+            lblOutputPath = new Label();
+            txtOutputPath = new TextBox();
+            btnBrowseOutput = new Button();
+
+            pnlButtons = new Panel();
+            btnMerge = new Button();
+            btnClear = new Button();
+            btnExit = new Button();
+
+            grpProgress = new GroupBox();
+            progressBar = new ProgressBar();
+            txtLog = new TextBox();
+
+            // 设置源文件夹组
+            grpSourceFolder.Text = "源文件夹";
+            grpSourceFolder.Location = new Point(10, 10);
+            grpSourceFolder.Size = new Size(580, 60);
+            grpSourceFolder.TabStop = false;
+
+            lblSourcePath.Text = "路径:";
+            lblSourcePath.Location = new Point(10, 25);
+            lblSourcePath.Size = new Size(30, 23);
+
+            txtSourcePath.Location = new Point(45, 22);
+            txtSourcePath.Size = new Size(470, 23);
+
+            btnBrowseSource.Text = "浏览";
+            btnBrowseSource.Location = new Point(520, 20);
+            btnBrowseSource.Size = new Size(50, 25);
+            btnBrowseSource.Click += new EventHandler(btnBrowseSource_Click);
+
+            grpSourceFolder.Controls.Add(lblSourcePath);
+            grpSourceFolder.Controls.Add(txtSourcePath);
+            grpSourceFolder.Controls.Add(btnBrowseSource);
+
+            // 设置输出文件夹组
+            grpOutputFolder.Text = "输出文件夹";
+            grpOutputFolder.Location = new Point(10, 80);
+            grpOutputFolder.Size = new Size(580, 60);
+            grpOutputFolder.TabStop = false;
+
+            lblOutputPath.Text = "路径:";
+            lblOutputPath.Location = new Point(10, 25);
+            lblOutputPath.Size = new Size(30, 23);
+
+            txtOutputPath.Location = new Point(45, 22);
+            txtOutputPath.Size = new Size(470, 23);
+
+            btnBrowseOutput.Text = "浏览";
+            btnBrowseOutput.Location = new Point(520, 20);
+            btnBrowseOutput.Size = new Size(50, 25);
+            btnBrowseOutput.Click += new EventHandler(btnBrowseOutput_Click);
+
+            grpOutputFolder.Controls.Add(lblOutputPath);
+            grpOutputFolder.Controls.Add(txtOutputPath);
+            grpOutputFolder.Controls.Add(btnBrowseOutput);
+
+            // 设置按钮面板
+            pnlButtons.Location = new Point(10, 150);
+            pnlButtons.Size = new Size(580, 40);
+
+            btnMerge.Text = "合并";
+            btnMerge.Location = new Point(10, 8);
+            btnMerge.Size = new Size(75, 25);
+            btnMerge.Click += new EventHandler(btnMerge_Click);
+
+            btnClear.Text = "清空";
+            btnClear.Location = new Point(100, 8);
+            btnClear.Size = new Size(75, 25);
+            btnClear.Click += new EventHandler(btnClear_Click);
+
+            btnExit.Text = "退出";
+            btnExit.Location = new Point(190, 8);
+            btnExit.Size = new Size(75, 25);
+            btnExit.Click += new EventHandler(btnExit_Click);
+
+            pnlButtons.Controls.Add(btnMerge);
+            pnlButtons.Controls.Add(btnClear);
+            pnlButtons.Controls.Add(btnExit);
+
+            // 设置进度组
+            grpProgress.Text = "进度";
+            grpProgress.Location = new Point(10, 200);
+            grpProgress.Size = new Size(580, 180);
+            grpProgress.TabStop = false;
+
+            progressBar.Location = new Point(10, 25);
+            progressBar.Size = new Size(560, 23);
+            progressBar.Style = ProgressBarStyle.Continuous;
+
+            txtLog.Location = new Point(10, 55);
+            txtLog.Size = new Size(560, 115);
+            txtLog.Multiline = true;
+            txtLog.ScrollBars = ScrollBars.Vertical;
+            txtLog.ReadOnly = true;
+
+            grpProgress.Controls.Add(progressBar);
+            grpProgress.Controls.Add(txtLog);
+
+            // 添加所有控件到窗体
+            Controls.Add(grpSourceFolder);
+            Controls.Add(grpOutputFolder);
+            Controls.Add(pnlButtons);
+            Controls.Add(grpProgress);
         }
 
         #endregion
+
+        private GroupBox grpSourceFolder;
+        private Label lblSourcePath;
+        private TextBox txtSourcePath;
+        private Button btnBrowseSource;
+        private GroupBox grpOutputFolder;
+        private Label lblOutputPath;
+        private TextBox txtOutputPath;
+        private Button btnBrowseOutput;
+        private Panel pnlButtons;
+        private Button btnMerge;
+        private Button btnClear;
+        private Button btnExit;
+        private GroupBox grpProgress;
+        private ProgressBar progressBar;
+        private TextBox txtLog;
     }
 }

WinFormsApp1/Form1.cs

@@ -6,5 +6,244 @@ namespace WinFormsApp1
         {
             InitializeComponent();
         }
+
+        private void btnBrowseSource_Click(object sender, EventArgs e)
+        {
+            using (FolderBrowserDialog dialog = new FolderBrowserDialog())
+            {
+                dialog.Description = "选择Excel文件夹";
+                if (dialog.ShowDialog() == DialogResult.OK)
+                {
+                    txtSourcePath.Text = dialog.SelectedPath;
+                    txtOutputPath.Text = dialog.SelectedPath; // 默认输出到源文件夹
+                    Log($"源文件夹: {dialog.SelectedPath}");
+                }
+            }
+        }
+
+        private void btnBrowseOutput_Click(object sender, EventArgs e)
+        {
+            using (FolderBrowserDialog dialog = new FolderBrowserDialog())
+            {
+                dialog.Description = "选择输出文件夹";
+                if (dialog.ShowDialog() == DialogResult.OK)
+                {
+                    txtOutputPath.Text = dialog.SelectedPath;
+                    Log($"输出文件夹: {dialog.SelectedPath}");
+                }
+            }
+        }
+
+        private void btnClear_Click(object sender, EventArgs e)
+        {
+            txtSourcePath.Clear();
+            txtOutputPath.Clear();
+            txtLog.Clear();
+            progressBar.Value = 0;
+        }
+
+        private void btnExit_Click(object sender, EventArgs e)
+        {
+            Application.Exit();
+        }
+
+        private void btnMerge_Click(object sender, EventArgs e)
+        {
+            // 前置校验
+            if (string.IsNullOrEmpty(txtSourcePath.Text) || string.IsNullOrEmpty(txtOutputPath.Text))
+            {
+                MessageBox.Show("请选择源文件夹和输出文件夹", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+
+            try
+            {
+                MergeExcel();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show($"合并过程中发生错误: {ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                Log($"合并失败: {ex.Message}");
+            }
+        }
+
+        private void MergeExcel()
+        {
+            var sourceDir = txtSourcePath.Text;
+            var outputDir = txtOutputPath.Text;
+            var outputFile = Path.Combine(outputDir, "合并结果.xlsx");
+
+            if (!Directory.Exists(sourceDir))
+            {
+                MessageBox.Show("源文件夹不存在", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+
+            // 查找xlsx文件（排除合并结果本身）
+            var xlsxFiles = Directory.GetFiles(sourceDir, "*.xlsx")
+                .Where(f => !Path.GetFileName(f).Equals("合并结果.xlsx", StringComparison.OrdinalIgnoreCase))
+                .ToArray();
+
+            if (xlsxFiles.Length == 0)
+            {
+                MessageBox.Show("未找到待合并的Excel文件", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+
+            Log($"找到 {xlsxFiles.Length} 个文件，开始合并...");
+            progressBar.Maximum = xlsxFiles.Length;
+            progressBar.Value = 0;
+
+            // 设置EPPlus许可证上下文
+            OfficeOpenXml.ExcelPackage.LicenseContext = OfficeOpenXml.LicenseContext.NonCommercial;
+
+            var allData = new List<System.Data.DataTable>();
+            var headers = new List<string>();
+
+            try
+            {
+                // 处理每个文件
+                for (int idx = 0; idx < xlsxFiles.Length; idx++)
+                {
+                    var file = xlsxFiles[idx];
+                    var fileName = Path.GetFileName(file);
+
+                    Log($"处理: {fileName}");
+
+                    try
+                    {
+                        using (var package = new OfficeOpenXml.ExcelPackage(new FileInfo(file)))
+                        {
+                            if (package.Workbook.Worksheets.Count == 0)
+                            {
+                                Log($"跳过空文件: {fileName}");
+                                continue;
+                            }
+
+                            var worksheet = package.Workbook.Worksheets[0]; // 使用第一个工作表
+                            var table = new System.Data.DataTable();
+
+                            // 获取表头
+                            if (headers.Count == 0)
+                            {
+                                var columnCount = worksheet.Dimension.End.Column;
+                                for (int col = 1; col <= columnCount; col++)
+                                {
+                                    var header = worksheet.Cells[1, col].Text?.Trim() ?? $"Column{col}";
+                                    headers.Add(header);
+                                    table.Columns.Add(header);
+                                }
+                            }
+                            else
+                            {
+                                // 创建相同结构的表
+                                foreach (var header in headers)
+                                {
+                                    table.Columns.Add(header);
+                                }
+                            }
+
+                            // 跳过表头行，从第二行开始读取数据
+                            var rowCount = worksheet.Dimension.End.Row;
+                            for (int row = 2; row <= rowCount; row++)
+                            {
+                                var dataRow = table.NewRow();
+                                var isEmpty = true;
+
+                                for (int col = 0; col < headers.Count; col++)
+                                {
+                                    var cellValue = worksheet.Cells[row, col + 1].Text;
+                                    dataRow[col] = cellValue;
+                                    if (!string.IsNullOrWhiteSpace(cellValue))
+                                    {
+                                        isEmpty = false;
+                                    }
+                                }
+
+                                if (!isEmpty)
+                                {
+                                    table.Rows.Add(dataRow);
+                                }
+                            }
+
+                            if (table.Rows.Count > 0)
+                            {
+                                allData.Add(table);
+                                Log($"成功读取 {fileName}: {table.Rows.Count} 行数据");
+                            }
+                            else
+                            {
+                                Log($"跳过无数据文件: {fileName}");
+                            }
+                        }
+                    }
+                    catch (Exception ex)
+                    {
+                        Log($"处理失败: {fileName} - {ex.Message}");
+                        continue;
+                    }
+
+                    progressBar.Value = idx + 1;
+                    Application.DoEvents();
+                }
+
+                // 合并数据并保存
+                if (allData.Count == 0)
+                {
+                    MessageBox.Show("无有效数据可合并", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    return;
+                }
+
+                // 创建合并后的Excel文件
+                using (var outputPackage = new OfficeOpenXml.ExcelPackage())
+                {
+                    var outputSheet = outputPackage.Workbook.Worksheets.Add("合并结果");
+
+                    // 写入表头
+                    for (int col = 0; col < headers.Count; col++)
+                    {
+                        outputSheet.Cells[1, col + 1].Value = headers[col];
+                    }
+
+                    int currentRow = 2;
+                    int totalRows = 0;
+
+                    // 合并所有数据
+                    foreach (var table in allData)
+                    {
+                        foreach (System.Data.DataRow row in table.Rows)
+                        {
+                            for (int col = 0; col < headers.Count; col++)
+                            {
+                                outputSheet.Cells[currentRow, col + 1].Value = row[col];
+                            }
+                            currentRow++;
+                            totalRows++;
+                        }
+                    }
+
+                    // 保存文件
+                    outputPackage.SaveAs(new FileInfo(outputFile));
+
+                    Log($"合并完成！文件路径: {outputFile}");
+                    Log($"总行数: {totalRows} | 总列数: {headers.Count}");
+
+                    MessageBox.Show($"合并成功！\n文件：{outputFile}\n行数：{totalRows}",
+                        "完成", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                }
+            }
+            catch (Exception ex)
+            {
+                Log($"保存失败: {ex.Message}");
+                MessageBox.Show($"保存文件失败: {ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void Log(string msg)
+        {
+            txtLog.AppendText($"{msg}\r\n");
+            txtLog.ScrollToCaret();
+            Application.DoEvents();
+        }
     }
 }

WinFormsApp1/WinFormsApp1.csproj

@@ -8,4 +8,8 @@
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="EPPlus" Version="7.5.2" />
+  </ItemGroup>
+
 </Project>