C＃Excel到txt轉換並格式化輸出WPF

Question

我有一個WPF應用程序，當前有2個按鈕，一個用於選擇文件，一個用於將所選文件轉換為.txt格式。 現在，我需要使另一個按鈕讀取excel文件並格式化數據並創建一個.txt文件。

我的代碼如下所示：

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : System.Windows.Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    private void BtnFileOpen_Click(object sender, RoutedEventArgs e)
    {
        var fileDialog = new System.Windows.Forms.OpenFileDialog();
        var result = fileDialog.ShowDialog();
        switch (result)
        {
            case System.Windows.Forms.DialogResult.OK:
                var excelFilePath = fileDialog.FileName;
                TxtFile.Text = excelFilePath;
                TxtFile.ToolTip = excelFilePath;
                break;
            case System.Windows.Forms.DialogResult.Cancel:
            default:
                TxtFile.Text = null;
                TxtFile.ToolTip = null;
                break;
        }

    }

    private void convert_Click(object sender, RoutedEventArgs e)
    {
         exportExcelToTxt;
    }
    static void exportExcelToTxt(string excelFilePath, string outputTxtPath)
    {
        Dictionary<string, List<long>> values = new Dictionary<string, List<long>>();
        using (OleDbConnection excelConnection = new OleDbConnection(string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=Excel 8.0;HDR=YES", excelFilePath)))
        {
            excelConnection.Open();
            string firstSheet = getFirstSheetName(excelConnection);
            using (OleDbCommand cmd = excelConnection.CreateCommand())
            {
                cmd.CommandText = string.Format("SELECT * FROM [{0}]", firstSheet);
                using (OleDbDataAdapter da = new OleDbDataAdapter(cmd))
                {
                    using (DataTable dt = new DataTable())
                    {
                        da.Fill(dt); // Getting all the data in the sheet
                        foreach (DataRow item in dt.Rows)
                        {
                            List<long> toAdd = new List<long>();
                            string key = item[0] as string;
                            for (int i = 1; i < dt.Columns.Count; i++)
                            {
                                toAdd.Add(Convert.ToInt64(item[i]));
                            }
                            values.Add(key, toAdd); // Associating all the "numbers" to the "Name"
                        }
                    }
                }
            }
        }
        StringBuilder toWriteToTxt = new StringBuilder();
        foreach (KeyValuePair<string, List<long>> item in values)
        {
            // Formatting the output
            toWriteToTxt.Append(string.Format("{0}:", item.Key));
            foreach (long val in item.Value.Distinct())
            {
                toWriteToTxt.AppendFormat("\t{0} * {1}\r\n", item.Value.Where(f => f == val).Count(),  // Amount of occurrencies of each number
                    val);
            }
        }
        // Writing the TXT
        using (FileStream fs = new FileStream(outputTxtPath, FileMode.Create))
        {
            using (StreamWriter sw = new StreamWriter(fs))
            {
                sw.Write(toWriteToTxt.ToString());
            }
        }
    }


    static string getFirstSheetName(OleDbConnection excelConnection)
    {
        using (DataTable ExcelTables = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new Object[] { null, null, null, "TABLE" }))
        {
            return ExcelTables.Rows[0]["TABLE_NAME"].ToString();
        }
    }
}
}

我將在其上使用的Excel文件將如下所示：

|  A  |  B  |  C  |  D  |...
| Name|  1  |  2  |  3  |...
|  X  | 898 | 896 | 898 |...

.txt我想看起來像這樣：

 X:   4 * 898
      6 * 896

基本上，因此它使用從A2到A n的名稱，然后計算從B2到AF2的所有相同實例。 最后，我將得到一個txt文件，其中所有名稱都具有上述列表。 我還參考了Microsoft.Office.Interop.Excel，因為我讀到它是必需的，卻發現了這一點，但是由於我是excel相關代碼的新手，所以我不知道我可以從那里使用什么作為應用程序的用途，這有很大的不同從我的。

如何使按鈕具有上述功能？

---

我添加了codroipo給定的代碼，現在有了這些庫：

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

我還更改了"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=Excel 8.0;", excelFilePath

到"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=Excel 8.0;", excelFilePath但是在這里我仍然得到調試錯誤：

// Writing the TXT
    using (FileStream fs = new FileStream(outputTxtPath, FileMode.Create))
    {
        using (StreamWriter sw = new StreamWriter(fs))
        {
            sw.Write(toWriteToTxt.ToString());
        }
    }
}

static string getFirstSheetName(OleDbConnection excelConnection)
{
    using (DataTable ExcelTables = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new Object[] { null, null, null, "TABLE" }))
    {
        return ExcelTables.Rows[0]["TABLE_NAME"].ToString();
    }
}

找不到類型或名稱空間名稱“ FileStream”（是否缺少using指令或程序集引用？）

static string getFirstSheetName(OleDbConnection excelConnection) 字符串有錯誤：

“預期的類，委托，枚舉，接口或結構”

就像下一行的Object []一樣 。

我想念圖書館嗎？

Answer 1

我建議您在這種情況下使用Microsoft.Jet.OLEDB（如果要進行比較，請檢查“ 哪個是最好的OLEDB或Excel對象或數據庫” ），以下是一些可以使用的代碼。 我編寫此代碼是假設您只想導出Excel中的第一張表：

    static void exportExcelToTxt(string excelFilePath, string outputTxtPath)
    {
        Dictionary<string, List<long?>> values = new Dictionary<string, List<long?>>();
        using (OleDbConnection excelConnection = new OleDbConnection(string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=Excel 8.0;", excelFilePath)))
        {
            excelConnection.Open();
            string firstSheet = getFirstSheetName(excelConnection);
            using (OleDbCommand cmd = excelConnection.CreateCommand())
            {
                cmd.CommandText = string.Format("SELECT * FROM [{0}]", firstSheet);
                using (OleDbDataAdapter da = new OleDbDataAdapter(cmd))
                {
                    using (DataTable dt = new DataTable())
                    {
                        da.Fill(dt); // Getting all the data in the sheet
                        foreach (DataRow item in dt.Rows)
                        {
                            List<long?> toAdd = new List<long?>();
                            string key = item[0] as string;
                            for (int i = 1; i < dt.Columns.Count; i++)
                            {
                                toAdd.Add(item[i] != DBNull.Value ? (long?)Convert.ToInt64(item[i]) : null);
                            }
                            values.Add(key, toAdd); // Associating all the "numbers" to the "Name"
                        }
                    }
                }
            }
        }
        StringBuilder toWriteToTxt = new StringBuilder();
        foreach (KeyValuePair<string, List<long?>> item in values)
        {
            // Formatting the output
            toWriteToTxt.Append(string.Format("{0}:", item.Key));
            foreach (long val in item.Value.Where(f => f != null).Distinct())
            {
                toWriteToTxt.AppendFormat("\t{0} * {1}\r\n", item.Value.Where(f => f == val).Count(),  // Amount of occurrencies of each number
                    val);
            }
        }
        // Writing the TXT
        using (FileStream fs = new FileStream(outputTxtPath, FileMode.Create))
        {
            using (StreamWriter sw = new StreamWriter(fs))
            {
                sw.Write(toWriteToTxt.ToString());
            }
        }
    }

    static string getFirstSheetName(OleDbConnection excelConnection)
    {
        using (DataTable ExcelTables = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new Object[] { null, null, null, "TABLE" }))
        {
            return ExcelTables.Rows[0]["TABLE_NAME"].ToString();
        }
    }