asp.net - 将 Excel 文件从 ASP.NET 应用程序上传到 MySQL 时出错

Question

我正在开发一个带有MySQL数据库的 Web 应用程序 ( ASP.NET )。当我尝试通过此应用程序上传 Excel 文件 ( .xlsx ) 时，我没有任何问题。当文件超过 24904 条记录时，问题就开始了。

那时我收到以下错误：

此表包含超出此电子表格中定义的单元格范围的单元格。

它写入前 24904 条记录。

我试图将负载分成多批，但没有奏效。

有什么想法吗？

Dim connExcel As New System.Data.OleDb.OleDbConnection(conStr)
Dim cmdExcel As New System.Data.OleDb.OleDbCommand()
Dim dt As New DataTable()
Dim dataset As New DataSet
Dim x As Integer = 2
Dim y As Integer = 20001
Dim range As String = "A" + x.ToString + ":" + "I" + y.ToString

cmdExcel.Connection = connExcel

If erro = 0 Then
    Try

        For i As Integer = 0 To 50
            connExcel.Open()

            dataset.Reset()
            dataset.Clear()

            Dim oda As New System.Data.OleDb.OleDbDataAdapter("SELECT * FROM [Sheet1$" & range.ToString & "]", connExcel)
            oda.TableMappings.Add("Table", "ExcelTest")

            oda.Fill(dataset)
            connExcel.Close()

            If dataset.Tables(0).Rows.Count > 0 Then
                SendToDB(dataset)
            Else
                i = 50
            End If

            x = x + 20000
            y = y + 20000

            range = "A" + x.ToString + ":" + "I" + y.ToString
        Next

        Label7.Visible = True
        Label7.Text = "The information has been written successfully from 0 to " + y.ToString

    Catch ex As Exception
        Label9.Visible = True
        Label9.Text = "Database Error 2:" + ex.Message
        connExcel.Close()
    End Try
End If

score 1 · Accepted Answer

我不使用 OLDB 或 excel，因为它在阅读 excel 时会产生很多问题

我使用 ExcelDataReader https://github.com/ExcelDataReader/ExcelDataReader

尝试这个

安装包 ExcelDataReader

public static DataSet GetExcelDataSet(string filePath)
    {
        FileStream stream = File.Open(filePath, FileMode.Open, FileAccess.Read);

        IExcelDataReader excelReader;
        if (Path.GetExtension(filePath) == ".xls")
        {
            //Choose one of either 1 or 2
            //1. Reading from a binary Excel file ('97-2003 format; *.xls)
            excelReader = ExcelReaderFactory.CreateBinaryReader(stream);
        }
        else
        {
            //2. Reading from a OpenXml Excel file (2007 format; *.xlsx)
            excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
        }
        //Choose one of either 3, 4, or 5
        //3. DataSet - The result of each spreadsheet will be created in the result.Tables

        ////////DataSet result = excelReader.AsDataSet();

        //4. DataSet - Create column names from first row
        excelReader.IsFirstRowAsColumnNames = true;
        DataSet result = excelReader.AsDataSet();

        //5. Data Reader methods
        //while (excelReader.Read())
        //{
        //    //excelReader.GetInt32(0);
        //}

        //6. Free resources (IExcelDataReader is IDisposable)
        excelReader.Close();
        return result;
    }

score 0 · Accepted Answer

我怀疑您已达到 Excel 限制（例如您可以添加的表映射数量）

尝试以更高的数字开始循环计数，看看它是否是您执行此操作的次数而不是导致问题的数据。也许是这样的：

Dim x As Integer = 40002
Dim y As Integer = 60001

score 0 · Accepted Answer

你可以重置你的范围......通过添加计数器变量......为特定范围增加它......并重置它......

score 0 · Accepted Answer

您还可以在文件查询中使用 LOAD DATA 将 excel 文件加载到数据库中。查询的语法是：

LOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE 'file_name'
    [REPLACE | IGNORE]
    INTO TABLE tbl_name
    [CHARACTER SET charset_name]
    [{FIELDS | COLUMNS}
        [TERMINATED BY 'string']
        [[OPTIONALLY] ENCLOSED BY 'char']
        [ESCAPED BY 'char']
    ]
    [LINES
        [STARTING BY 'string']
        [TERMINATED BY 'string']
    ]
    [IGNORE number LINES]
    [(col_name_or_user_var,...)]
    [SET col_name = expr,...]

score 0 · Accepted Answer

Excel 的限制比这更大。您的单元格包含超出指定范围的隐藏字符或空格（如错误消息所述），请检查错误行上“最后一个”列右侧的列。我想你会发现它们包含一些东西。

一种简单的测试方法，创建一个包含 50 000 条记录的全新文件，其中填充了新数据。我想你会发现它有效。

score 0 · Accepted Answer

删除范围使用 Sheet1 ...并重新测试 Dim oda As New System.Data.OleDb.OleDbDataAdapter("SELECT * FROM [Sheet1$]", connExcel)

asp.net - 将 Excel 文件从 ASP.NET 应用程序上传到 MySQL 时出错

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