C＃读取XLSX文件

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在处理各种Excel格式时，通常需要读取数据并以编程方式操作它。在以下教程中，我们将学习如何使用一个方便的工具 IronXL 在 C# 中从 Excel 表格读取数据。

用 C# 阅读 .XLSX 文件

为您的项目获取 IronXL
加载工作簿
访问工作表中的数据
应用求和、最小和最大等函数
以数据表、数据集等形式读取工作表

步骤 1

1. 为您的项目获取 IronXL

在您的项目中使用IronXL，以简单的方式在C#中处理Excel文件格式。您可以通过直接下载安装 IronXL或者您也可以使用为 Visual Studio 安装 NuGet. 软件开发免费。

Install-Package IronXL.Excel

教程

2. 加载工作簿

WorkBook 是 IronXL 的一个类，其对象提供对 Excel 文件及其全部功能的完全访问权限。例如，如果我们想要访问Excel文件，我们会使用以下代码：

/**
Load Workbook
anchor-load-workbook
**/
WorkBook wb = WorkBook.Load("sample.xlsx");//Excel file path

/**
Load Workbook
anchor-load-workbook
**/
WorkBook wb = WorkBook.Load("sample.xlsx");//Excel file path

'''
'''Load Workbook
'''anchor-load-workbook
'''*
Dim wb As WorkBook = WorkBook.Load("sample.xlsx") 'Excel file path

VB C#

在上述代码中，WorkBook.Load()函数在wb中加载sample.xlsx。可以通过访问 Excel 文件的特定工作表来执行 wb 上的任何类型的功能。

3. 访问特定工作表

要访问 Excel 文件的特定工作表，IronXL 提供了 WorkSheet 类。可以通过几种不同的方式使用：

/**
Access Sheet by Name
anchor-access-specific-worksheet
**/
WorkSheet ws = wb.GetWorkSheet("Sheet1"); //by sheet name

/**
Access Sheet by Name
anchor-access-specific-worksheet
**/
WorkSheet ws = wb.GetWorkSheet("Sheet1"); //by sheet name

'''
'''Access Sheet by Name
'''anchor-access-specific-worksheet
'''*
Dim ws As WorkSheet = wb.GetWorkSheet("Sheet1") 'by sheet name

VB C#

wb 是在上文中声明的 WorkBook。

或

/**
Access Sheet by Index
anchor-access-specific-worksheet
**/
WorkSheet ws = wb.WorkSheets [0]; //by sheet index

/**
Access Sheet by Index
anchor-access-specific-worksheet
**/
WorkSheet ws = wb.WorkSheets [0]; //by sheet index

'''
'''Access Sheet by Index
'''anchor-access-specific-worksheet
'''*
Dim ws As WorkSheet = wb.WorkSheets (0) 'by sheet index

VB C#

或

WorkSheet ws = wb.DefaultWorkSheet; //for the default sheet:

WorkSheet ws = wb.DefaultWorkSheet; //for the default sheet:

Dim ws As WorkSheet = wb.DefaultWorkSheet 'for the default sheet:

VB C#

或

WorkSheet ws = wb.WorkSheets.First();//for the first sheet:

WorkSheet ws = wb.WorkSheets.First();//for the first sheet:

Dim ws As WorkSheet = wb.WorkSheets.First() 'for the first sheet:

VB C#

或

WorkSheet ws = wb.WorkSheets.FirstOrDefault();//for the first or default sheet:

WorkSheet ws = wb.WorkSheets.FirstOrDefault();//for the first or default sheet:

Dim ws As WorkSheet = wb.WorkSheets.FirstOrDefault() 'for the first or default sheet:

VB C#

获取 ExcelSheet ws 后，您可以从中获取任何类型的数据，并在其上执行所有 Excel 函数。

4. 从工作表访问数据

在此过程中，可以从 ExcelSheet ws 访问数据。

string c = ws ["cell address"].ToString(); //for string
Int32 val = ws ["cell address"].Int32Value; //for integer

string c = ws ["cell address"].ToString(); //for string
Int32 val = ws ["cell address"].Int32Value; //for integer

Dim c As String = ws ("cell address").ToString() 'for string
Dim val As Int32 = ws ("cell address").Int32Value 'for integer

VB C#

还可以从特定列的多个单元格中获取数据。

foreach (var cell in ws ["A2:A10"])
{
    Console.WriteLine("value is: {0}",  cell.Text);
}

foreach (var cell in ws ["A2:A10"])
{
    Console.WriteLine("value is: {0}",  cell.Text);
}

For Each cell In ws ("A2:A10")
	Console.WriteLine("value is: {0}", cell.Text)
Next cell

VB C#

它将显示从单元格A2到A10的值。

这里提供了上述具体内容的完整代码示例。

/**
Access WorkSheet Data
anchor-access-data-from-worksheet
**/
using IronXL;
static void Main(string [] args)
{
    WorkBook wb = WorkBook.Load("sample.xlsx");
    WorkSheet ws = wb.GetWorkSheet("Sheet1");
    foreach (var cell in ws ["A2:A10"])
    {
        Console.WriteLine("value is: {0}", cell.Text);
    }
    Console.ReadKey();
}

/**
Access WorkSheet Data
anchor-access-data-from-worksheet
**/
using IronXL;
static void Main(string [] args)
{
    WorkBook wb = WorkBook.Load("sample.xlsx");
    WorkSheet ws = wb.GetWorkSheet("Sheet1");
    foreach (var cell in ws ["A2:A10"])
    {
        Console.WriteLine("value is: {0}", cell.Text);
    }
    Console.ReadKey();
}

'''
'''Access WorkSheet Data
'''anchor-access-data-from-worksheet
'''*
Imports IronXL
Shared Sub Main(ByVal args() As String)
	Dim wb As WorkBook = WorkBook.Load("sample.xlsx")
	Dim ws As WorkSheet = wb.GetWorkSheet("Sheet1")
	For Each cell In ws ("A2:A10")
		Console.WriteLine("value is: {0}", cell.Text)
	Next cell
	Console.ReadKey()
End Sub

VB C#

将显示以下结果：

使用 Excel 文件 Sample.xlsx ：

我们可以看到，使用这些方法在项目中使用 Excel 文件数据是多么轻松。

5. 对数据执行功能

通过以下代码应用聚合函数（如Sum、Min或Max），可以非常简单地访问Excel工作表中的筛选数据：

decimal sum = ws ["From:To"].Sum();
decimal min = ws ["From:To"].Min();
decimal max = ws ["From:To"].Max();

decimal sum = ws ["From:To"].Sum();
decimal min = ws ["From:To"].Min();
decimal max = ws ["From:To"].Max();

Dim sum As Decimal = ws ("From:To").Sum()
Dim min As Decimal = ws ("From:To").Min()
Dim max As Decimal = ws ("From:To").Max()

VB C#

如果您想了解更多详情，请参阅我们的深入教程《如何编写 C# Excel 文件汇总功能的具体内容。

/**
Sum Min Max Functions
anchor-perform-functions-on-data
**/
using IronXL;
static void Main(string [] args)
{
    WorkBook wb = WorkBook.Load("sample.xlsx");
    WorkSheet ws = wb.GetWorkSheet("Sheet1");

    decimal sum = ws ["G2:G10"].Sum();
    decimal min = ws ["G2:G10"].Min();
    decimal max = ws ["G2:G10"].Max();

    Console.WriteLine("Sum is: {0}", sum);
    Console.WriteLine("Min is: {0}", min);
    Console.WriteLine("Max is: {0}", max);
    Console.ReadKey();
}

/**
Sum Min Max Functions
anchor-perform-functions-on-data
**/
using IronXL;
static void Main(string [] args)
{
    WorkBook wb = WorkBook.Load("sample.xlsx");
    WorkSheet ws = wb.GetWorkSheet("Sheet1");

    decimal sum = ws ["G2:G10"].Sum();
    decimal min = ws ["G2:G10"].Min();
    decimal max = ws ["G2:G10"].Max();

    Console.WriteLine("Sum is: {0}", sum);
    Console.WriteLine("Min is: {0}", min);
    Console.WriteLine("Max is: {0}", max);
    Console.ReadKey();
}

'''
'''Sum Min Max Functions
'''anchor-perform-functions-on-data
'''*
Imports IronXL
Shared Sub Main(ByVal args() As String)
	Dim wb As WorkBook = WorkBook.Load("sample.xlsx")
	Dim ws As WorkSheet = wb.GetWorkSheet("Sheet1")

	Dim sum As Decimal = ws ("G2:G10").Sum()
	Dim min As Decimal = ws ("G2:G10").Min()
	Dim max As Decimal = ws ("G2:G10").Max()

	Console.WriteLine("Sum is: {0}", sum)
	Console.WriteLine("Min is: {0}", min)
	Console.WriteLine("Max is: {0}", max)
	Console.ReadKey()
End Sub

VB C#

该代码将显示以下输出：

这就是 Excel 文件 Sample.xlsx 的外观：

6. 将 Excel 工作表读取为 DataTable

使用IronXL，将Excel工作表作为数据表操作非常简单。

DataTable dt=WorkSheet.ToDataTable();

DataTable dt=WorkSheet.ToDataTable();

Dim dt As DataTable=WorkSheet.ToDataTable()

VB C#

如果我们要使用 ExcelSheet 的第一行作为 DataTable 的列名，那么

DataTable dt=WorkSheet.ToDataTable(True);

DataTable dt=WorkSheet.ToDataTable(True);

Dim dt As DataTable=WorkSheet.ToDataTable([True])

VB C#

因此，"ToDataTable "的布尔参数()将第一行设置为数据表的列名。默认值为False。

/**
WorkSheet as DataTable
anchor-read-excel-worksheet-as-datatable
**/
using IronXL;
using System.Data; 
static void Main(string [] args)
{

    WorkBook wb = WorkBook.Load("sample.xlsx");
    WorkSheet ws = wb.GetWorkSheet("Sheet1");
    DataTable dt = ws.ToDataTable(true);//parse sheet1 of sample.xlsx file into datatable
    foreach (DataRow row in dt.Rows) //access rows
    {
        for (int i = 0; i < dt.Columns.Count; i++) //access columns of corresponding row
        {
            Console.Write(row [i]);
        }

    }
}

/**
WorkSheet as DataTable
anchor-read-excel-worksheet-as-datatable
**/
using IronXL;
using System.Data; 
static void Main(string [] args)
{

    WorkBook wb = WorkBook.Load("sample.xlsx");
    WorkSheet ws = wb.GetWorkSheet("Sheet1");
    DataTable dt = ws.ToDataTable(true);//parse sheet1 of sample.xlsx file into datatable
    foreach (DataRow row in dt.Rows) //access rows
    {
        for (int i = 0; i < dt.Columns.Count; i++) //access columns of corresponding row
        {
            Console.Write(row [i]);
        }

    }
}

'''
'''WorkSheet as DataTable
'''anchor-read-excel-worksheet-as-datatable
'''*
Imports IronXL
Imports System.Data
Shared Sub Main(ByVal args() As String)

	Dim wb As WorkBook = WorkBook.Load("sample.xlsx")
	Dim ws As WorkSheet = wb.GetWorkSheet("Sheet1")
	Dim dt As DataTable = ws.ToDataTable(True) 'parse sheet1 of sample.xlsx file into datatable
	For Each row As DataRow In dt.Rows 'access rows
		For i As Integer = 0 To dt.Columns.Count - 1 'access columns of corresponding row
			Console.Write(row (i))
		Next i

	Next row
End Sub

VB C#

使用上述代码，可以根据需要访问和使用工作表的每个单元格值。

7. 将 Excel 文件读取为 DataSet

IronXL 提供了如何使用完整 Excel 文件的非常简单的功能。(工作簿)作为数据集。

DataSet ds = WorkBook.ToDataSet();

DataSet ds = WorkBook.ToDataSet();

Dim ds As DataSet = WorkBook.ToDataSet()

VB C#

WorkBook 是您的 Excel 文件，正如我们下面的示例所示：

在此示例中，我们将看到如何将 Excel 文件用作 DataSet。

/**
Excel File as DataSet
anchor-read-excel-file-as-dataset
**/
using IronXL;
using System.Data; 
static void Main(string [] args)
{           
    WorkBook wb = WorkBook.Load("sample.xlsx");
    DataSet ds = wb.ToDataSet(); //Parse WorkBook wb into DataSet
    foreach (DataTable dt in ds.Tables)
    {
        Console.WriteLine(dt.TableName);
    }
}

/**
Excel File as DataSet
anchor-read-excel-file-as-dataset
**/
using IronXL;
using System.Data; 
static void Main(string [] args)
{           
    WorkBook wb = WorkBook.Load("sample.xlsx");
    DataSet ds = wb.ToDataSet(); //Parse WorkBook wb into DataSet
    foreach (DataTable dt in ds.Tables)
    {
        Console.WriteLine(dt.TableName);
    }
}

'''
'''Excel File as DataSet
'''anchor-read-excel-file-as-dataset
'''*
Imports IronXL
Imports System.Data
Shared Sub Main(ByVal args() As String)
	Dim wb As WorkBook = WorkBook.Load("sample.xlsx")
	Dim ds As DataSet = wb.ToDataSet() 'Parse WorkBook wb into DataSet
	For Each dt As DataTable In ds.Tables
		Console.WriteLine(dt.TableName)
	Next dt
End Sub

VB C#

上述代码的输出结果如下：

Excel 文件 Sample.xlsx 将显示如下：

在上面的示例中，我们可以看到，我们可以轻松地将 Excel 文件解析为 DataSet，并将每个 Excel 文件的 WorkSheet 作为一个 DataTable 来执行。深入了解如何将 Excel 作为 DataSet 进行解析这里展示了一些代码示例。

让我们再看一个如何访问所有Excel表格中每个单元格值的例子。在这里，我们可以访问 Excel 文件中每个工作表的每个单元格的值。

/**
WorkSheet Cell Values
anchor-read-excel-file-as-dataset
**/
using IronXL;
using System.Data; 
static void Main(string [] args)
{ 
WorkBook wb = WorkBook.Load("sample.xlsx");
DataSet ds = wb.ToDataSet();//behave complete Excel file as DataSet
foreach (DataTable dt in ds.Tables)//behave Excel WorkSheet as DataTable. 
{
    foreach (DataRow row in dt.Rows)//corresponding Sheet's Rows
    {
        for (int i = 0; i < dt.Columns.Count; i++)//Sheet columns of corresponding row
        {
            Console.Write(row [i]);
        }
    }
}
}

/**
WorkSheet Cell Values
anchor-read-excel-file-as-dataset
**/
using IronXL;
using System.Data; 
static void Main(string [] args)
{ 
WorkBook wb = WorkBook.Load("sample.xlsx");
DataSet ds = wb.ToDataSet();//behave complete Excel file as DataSet
foreach (DataTable dt in ds.Tables)//behave Excel WorkSheet as DataTable. 
{
    foreach (DataRow row in dt.Rows)//corresponding Sheet's Rows
    {
        for (int i = 0; i < dt.Columns.Count; i++)//Sheet columns of corresponding row
        {
            Console.Write(row [i]);
        }
    }
}
}

'''
'''WorkSheet Cell Values
'''anchor-read-excel-file-as-dataset
'''*
Imports IronXL
Imports System.Data
Shared Sub Main(ByVal args() As String)
Dim wb As WorkBook = WorkBook.Load("sample.xlsx")
Dim ds As DataSet = wb.ToDataSet() 'behave complete Excel file as DataSet
For Each dt As DataTable In ds.Tables 'behave Excel WorkSheet as DataTable.
	For Each row As DataRow In dt.Rows 'corresponding Sheet's Rows
		For i As Integer = 0 To dt.Columns.Count - 1 'Sheet columns of corresponding row
			Console.Write(row (i))
		Next i
	Next row
Next dt
End Sub

VB C#

在上面的示例中，访问Excel文件的每个工作表的每个单元格值非常方便。

有关如何的更多信息无需互操作即可读取 Excel 文件在此查看代码。