Question

我遇到了这样的问题。我试图读取Excel文件数据，都是一个字符串。我用过代码。

try
{
    var connectionString = string.Format( "Provider=Microsoft.Jet.OLEDB.4.0; data source={0}; Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1\"", session["FilePath"] );
    using (var adapter = new System.Data.OleDb.OleDbDataAdapter( "SELECT * FROM [Sheet1$]", connectionString ))
    {
        var ds = new DataSet();
        adapter.Fill( ds, "workBook" );
        workBook = ds.Tables["workBook"];
    }
    if (workBook == null)
        throw new Exception( "Could not load imported spreadsheet!" );
    if (workBook.Rows.Count <= 0)
        throw new Exception( "You are use an empty spreadsheet!" );
    foreach (DataColumn column in workBook.Columns)
        column.ColumnName = column.ColumnName.Trim();
}
catch (Exception exc)
{
}

一切正常，我得到一个数据表，数据作为字符串数据类型，并在程序级别解析它们（我只在一列中混合数据类型）。但是当单元格具有数字格式并且该单元格的值（例如，0589）时，我需要在单元格中添加前导撇号，因为0必须存在于4位数字中。当我尝试使用IMEX参数1读取这样的excel文件时，我从该单元格获得了NULL值。我不明白为什么，我把所有数据都读成字符串数据类型。

Answer 1

将单元格的数字格式更改为＆＃34; 0000＆＃34;对于一个始终为4位数的数字并保留前导零。

Answer 2

正如我解决的那样，在加载电子表格之前，我在程序级别将注册表项TypeGuessRows设置为零，并在加载回8之后（如果其他程序将使用它）。

Answer 3

     string file = "C:\\temp\\Exposure\\UTC.xlsx";
        OleDbConnectionStringBuilder connStringBuilder = new OleDbConnectionStringBuilder();
        connStringBuilder.DataSource = file;
        connStringBuilder.Provider = "Microsoft.ACE.OLEDB.12.0";

        connStringBuilder.Add("Extended Properties", "Excel 8.0;HDR=NO;IMEX=1");

        DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.OleDb");

        DbConnection connection = factory.CreateConnection();
        connection.ConnectionString = connStringBuilder.ConnectionString;
        connection.Open();

        // var myTableName = connection.GetSchema("Tables").Rows[0]["TABLE_NAME"];

        DbCommand selectCommand = factory.CreateCommand();

        string sql = "SELECT * FROM [Daily Monitoring$]";
        selectCommand.CommandText = sql;
        selectCommand.Connection = connection;

        DbDataAdapter adapter = factory.CreateDataAdapter();

        adapter.SelectCommand = selectCommand;
        DataSet data = new DataSet();
        adapter.Fill(data);
        DataTable dt = data.Tables[0];

        connection.Close();
        string ss = dt.Rows[1][1].ToString();

我无法读取其中包含前导撇号的Excel单元格

3 个答案: