组装电子表格
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本部分描述如何：
从头开始创建新的Excel文件并向其添加工作表
- 在设计电子表格中添加工作表
- 使用工作表名称访问工作表
- 使用工作表名称从Excel文件中移除工作表
- 使用工作表索引从Excel文件中移除工作表
- Aspose.Cells提供了一个名为Workbook的类，表示Excel文件。Workbook类包含了一个Worksheets集合，允许访问Excel文件中的每个工作表。
工作表由Worksheet类表示。Worksheet类提供了各种属性和方法来管理工作表。
向新的Excel文件添加工作表
要通过程序创建新的Excel文件:
- 创建Workbook类的对象
- 调用Worksheets集合的Add方法。一个空的工作表会自动添加到Excel文件中。通过向Worksheets集合传递新工作表的工作表索引来引用它。
- 获得工作表的引用
- 对工作表进行操作
- 通过调用Workbook类的Save方法保存具有新工作表的新Excel文件
//Instantiating a Workbook object
Workbook workbook = new Workbook();
//Adding a new worksheet to the Workbook object
int i = workbook.Worksheets.Add();
//Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.Worksheets[i];
//Setting the name of the newly added worksheet
worksheet.Name = "My Worksheet";
//Saving the Excel file
workbook.Save("Adding Worksheet.xls");
向设计电子表格添加工作表
向设计电子表格添加工作表的过程与添加新工作表的过程相同，只是Excel文件已经存在，因此在添加工作表之前应该先打开它。可以通过Workbook类打开设计电子表格。
//Creating a file stream containing the Excel file to be opened
FileStream fstream = new FileStream("book1.xls", FileMode.Open);
//Instantiating a Workbook object
//Opening the Excel file through the file stream
Workbook workbook = new Workbook(fstream);
//Adding a new worksheet to the Workbook object
int i = workbook.Worksheets.Add();
//Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.Worksheets[i];
//Setting the name of the newly added worksheet
worksheet.Name = "My Worksheet";
//Saving the Excel file
workbook.Save("Designer Spreadsheet.xls");
//Closing the file stream to free all resources
fstream.Close();
使用工作表名称访问工作表
通过指定工作表的名称或索引来访问或获取任何工作表。
//Creating a file stream containing the Excel file to be opened
FileStream fstream = new FileStream("WorksHeet Operations.xls", FileMode.Open);
//Instantiating a Workbook object
//Opening the Excel file through the file stream
Workbook workbook = new Workbook(fstream);
//Accessing a worksheet using its sheet name
Worksheet worksheet = workbook.Worksheets["Sheet1"];
使用工作表名称移除工作表
要从文件中移除工作表，请调用Worksheets集合的RemoveAt方法。将工作表名称传递给RemoveAt方法以移除特定工作表。
//Creating a file stream containing the Excel file to be opened
FileStream fstream = new FileStream("WorksHeet Operations.xls", FileMode.Open);
//Instantiating a Workbook object
//Opening the Excel file through the file stream
Workbook workbook = new Workbook(fstream);
//Removing a worksheet using its sheet name
workbook.Worksheets.RemoveAt("Sheet3");
workbook.Save("WorksHeet Operations.xls");
通过页索引删除工作表
按名称移除工作表适用于已知工作表名称的情况。如果不知道工作表的名称，可以使用重载版本的RemoveAt方法，该方法接受工作表的索引而不是工作表名称。
//creating a file stream containing the Excel file to be opened
FileStream fstream = new FileStream("WorksHeet Operations.xls", FileMode.Open);
//Instantiating a Workbook object
//Opening the Excel file through the file stream
Workbook workbook = new Workbook(fstream);
//Removing a worksheet using its sheet index
workbook.Worksheets.RemoveAt(1);
workbook.Save("WorksHeet Operations.xls");