Question

在我的Excel工作簿中

第一张工作表标签包含

Number Name Code    Subject
100    Mark ABC Mathematics
101    John XYZ Physics

The second sheet tab contains

Number Name Code    Subject
103    Mark DEF Chemistry
104    John GHI Biology

我想将代码（它将是唯一的）作为参数传递并搜索整个excel工作簿

并获取名称和主题..

ie..select name，subject from myexcelworkbook，其中code ='ABC'

我能够获取工作表名称，列数等但无法搜索整个Excel工作簿并获得所需的值

        const string fileName="C:\\FileName.xls";

        OleDbConnectionStringBuilder connectionStringBuilder = new OleDbConnectionStringBuilder();
        connectionStringBuilder.Provider = "Microsoft.ACE.OLEDB.12.0";
        connectionStringBuilder.DataSource = fileName;
        connectionStringBuilder.Add("Mode", "Read");

        const string extendedProperties = "Excel 12.0;IMEX=1;HDR=YES";
        connectionStringBuilder.Add("Extended Properties", extendedProperties);
        using (OleDbConnection objConn = new OleDbConnection(connectionStringBuilder.ConnectionString))
       {
            objConn.Open();

            Microsoft.Office.Interop.Excel.Application xlsApp = new Microsoft.Office.Interop.Excel.Application();
            Workbook wb = xlsApp.Workbooks.Open(fileName, 0, true, 5, "", "", true, XlPlatform.xlWindows, "\t", false, false, 0, true);

            Sheets sheets = wb.Worksheets;

            for (int i =1 ; i <= wb.Worksheets.Count; i++)
            {

                MessageBox.Show(wb.Sheets[i].Name.ToString()); - gives sheet names inside the workbook
            }

          Worksheet ws = (Worksheet)sheets.get_Item(1); - gives the elements of specified sheet tab
      }

  //To get elements inside a specific sheet of an excel workbook/get column names

        OleDbCommand objCmdSelect = new OleDbCommand("SELECT * FROM [" + "Sheet1" + "$]", objConn); 

        OleDbDataAdapter objAdapter1 = new OleDbDataAdapter(); 

        objAdapter1.SelectCommand = objCmdSelect; 

        DataSet objDataset1 = new DataSet(); 

        objAdapter1.Fill(objDataset1);

        string columnNames = string.Empty;
        // For each DataTable, print the ColumnName. use dataset.Rows to iterate row data...
        foreach (System.Data.DataTable table in objDataset1.Tables)
        {
            foreach (DataColumn column in table.Columns)
            {
                if (columnNames.Length > 0)
                {
                    columnNames = columnNames + Environment.NewLine + column.ColumnName;
                }
                else
                {
                    columnNames = column.ColumnName;
                }

            }
        }

有人可以分享一些想法，以便我可以找到excel工作簿中的唯一数据并根据它获取所需的值吗？提前谢谢。

Answer 1

如果工作簿的结构与您指示的一样，并且您将查询多个学生，那么，正如@Andy G建议的那样，您可能会发现将数据转换为某种形式的记录集最简单，然后对其运行查询通过Linq或SQL或您喜欢的任何内容。由于您不希望完全修改Excel工作簿，这可能是一种更好的方法。

或者，您可以使用Excel API，就像您也尝试使用一样。您可以通过工作表进行枚举，在每个工作表上运行查找。拉：

internal void GetYourData()
{
    //... code to get the relevant Workbook and relevant/new Excel Application

    Tuple<string, string> pupil;
    string searchTerm = "ABC";

    //Get the cell of the match
    Range match = FindFirstOccurrenceInWorkbook(workbook, searchTerm);
    if (match != null)
    {
        //Do whatever - per your data structure, it is probably easiest to just use .Offset(row, column) property
        pupil = new Tuple<string, string>((string)match.Offset(0, -1).Value, (string)match.Offset(0, 1).Value);
    }

    //... code to do whatever with your results
}

internal static Range FindFirstOccurrenceInWorkbook(Workbook workbook, string searchTerm)
{
    if (workbook == null) throw new ArgumentNullException("workbook");
    if (searchTerm == null) throw new ArgumentNullException("searchTerm");

    Sheets wss = workbook.Worksheets;
    Range match = null;

    foreach (Worksheet ws in wss)
    {
        Range cells = ws.Cells;
        //Add more args as needed - this is just an example
        match = cells.Find(
                what: searchTerm,
                after: Type.Missing,
                lookIn: XlFindLookIn.xlFormulas,
                lookAt: XlLookAt.xlPart);
        System.Runtime.InteropServices.Marshal.ReleaseComObject(cells);
        System.Runtime.InteropServices.Marshal.ReleaseComObject(ws);
        if (match != null)
        {
            break;
        }
    }
    System.Runtime.InteropServices.Marshal.ReleaseComObject(wss);
    GC.Collect();
    GC.WaitForPendingFinalizers();
    GC.Collect();

    return match;
}

此外，您不能使用像您一样使用COM对象而不生成孤立引用 - ＆gt;这将阻止Excel应用程序关闭。您需要将要使用的所有对象属性（如Workbook.Worksheets）显式分配给变量，然后在变量即将超出范围时调用System.Runtime.InteropServices.Marshal.ReleaseCOMObject（object）。

搜索整个工作簿并获取值

1 个答案: