C# EPPlus帮助类（EPPlusExcelHelper）

标签：names   rap   转换   system   get   没有   设置   pac   sys   

public class EPPlusExcelHelper : IDisposable
{
    public ExcelPackage ExcelPackage { get; private set; }
    private Stream fs;

    public EPPlusExcelHelper(string filePath)
    {
        if (File.Exists(filePath))
        {
            var file = new FileInfo(filePath);
            ExcelPackage = new ExcelPackage(file);
        }
        else
        {
            fs = File.Create(filePath);
            ExcelPackage = new ExcelPackage(fs);

        }
    }

    /// 

    /// 获取sheet，没有则创建
    /// 
    /// 
    /// 
    public ExcelWorksheet GetOrAddSheet(string sheetName)
    {
        ExcelWorksheet ws = ExcelPackage.Workbook.Worksheets.FirstOrDefault(i => i.Name == sheetName);
        if (ws == null)
        {
            ws = ExcelPackage.Workbook.Worksheets.Add(sheetName);
        }
        return ws;
    }

    /// 

    /// DataTable数据导出到Excel(xlsx)
    /// 
    /// ExcelPackage
    /// 数据源
    public void AppendSheetToWorkBook(DataTable sourceTable)
    {
        AppendSheetToWorkBook(sourceTable, true);
    }

    /// 

    /// DataTable数据导出到Excel(xlsx)
    /// 
    /// ExcelPackage
    /// 数据源
    /// 是否删除同名的sheet
    public void AppendSheetToWorkBook(DataTable sourceTable, bool isDeleteSameNameSheet)
    {
        //创建worksheet
        ExcelWorksheet ws = AddSheet(sourceTable.TableName, isDeleteSameNameSheet);
        //从单元格A1开始，将数据表加载到工作表中。第1行输出列名
        ws.Cells["A1"].LoadFromDataTable(sourceTable, true);
        //格式化Row
        FromatRow(sourceTable.Rows.Count, sourceTable.Columns.Count, ws);
    }


    /// 

    /// 删除指定的sheet
    /// 
    /// 
    /// 
    public void DeleteSheet(string sheetName)
    {
        var sheet = ExcelPackage.Workbook.Worksheets.FirstOrDefault(i => i.Name == sheetName);
        if (sheet != null)
        {
            ExcelPackage.Workbook.Worksheets.Delete(sheet);
        }
    }

    /// 

    /// 导出列表到excel，已存在同名sheet将删除已存在的
    /// 
    /// 
    /// 
    /// 数据源
    /// sheet名称
    public void AppendSheetToWorkBook(IEnumerable list, string sheetName)
    {
        AppendSheetToWorkBook(list, sheetName, true);
    }

    /// 

    /// 导出列表到excel，已存在同名sheet将删除已存在的
    /// 
    /// 
    /// 
    /// 数据源
    /// sheet名称
    /// 是否删除已存在的同名sheet，false时将重命名导出的sheet
    public void AppendSheetToWorkBook(IEnumerable list, string sheetName, bool isDeleteSameNameSheet)
    {
        ExcelWorksheet ws = AddSheet(sheetName, isDeleteSameNameSheet);
        ws.Cells["A1"].LoadFromCollection(list, true);
    }

    /// 

    /// 添加文字图片
    /// 
    /// 
    /// 要转换成图片的文字
    public void AddPicture(string sheetName, string msg)
    {
        Bitmap img = GetPictureString(msg);

        var sheet = GetOrAddSheet(sheetName);
        var picName = "92FF5CFE-2C1D-4A6B-92C6-661BDB9ED016";
        var pic = sheet.Drawings.FirstOrDefault(i => i.Name == picName);
        if (pic != null)
        {
            sheet.Drawings.Remove(pic);
        }
        pic = sheet.Drawings.AddPicture(picName, img);

        pic.SetPosition(3, 0, 6, 0);
    }

    /// 

    /// 文字绘制图片
    /// 
    /// 
    /// 
    private static Bitmap GetPictureString(string msg)
    {
        var msgs = msg.Split(new string[] { System.Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
        var maxLenght = msgs.Max(i => i.Length);
        var rowCount = msgs.Count();
        var rowHeight = 23;
        var fontWidth = 17;
        var img = new Bitmap(maxLenght * fontWidth, rowCount * rowHeight);
        using (Graphics g = Graphics.FromImage(img))
        {
            g.Clear(Color.White);
            Font font = new Font("Arial", 12, (FontStyle.Bold));
            LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, img.Width, img.Height), Color.Blue, Color.DarkRed, 1.2f, true);

            for (int i = 0; i 
    /// List转DataTable
    /// 
    /// 
    /// 
    /// 
    public DataTable ListToDataTable(IEnumerable data)
    {
        PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
        DataTable dataTable = new DataTable();
        for (int i = 0; i 
    /// 插入行
    /// 
    /// 
    /// 行类容，一个单元格一个对象
    /// 插入位置，起始位置为1
    public void InsertValues(string sheetName, List

C# EPPlus帮助类（EPPlusExcelHelper）

标签：names   rap   转换   system   get   没有   设置   pac   sys   

原文地址：https://www.cnblogs.com/zhaoshujie/p/14864683.html