Aspose Cells 添加数据验证(动态下拉列表验证)

参考 ：http://www.componentcn.com/kongjianjishu/kongjianjishu/2015-06-04/2781.html

Aspose Cells是一款操作和处理以及转换Excel文件的类库，支持.NET和JAVA版，几乎所有Excel能实现的功能，Aspose Cells都可以实现，Microsoft Excel支持多种不同类型的数据验证，每一种类型用于控制数据输入或者单元格范围，比如经常用到的：整数验证、小数位数验证、值范围验证、时间验证、文本字符长度验证等。

控件中国网是Aspose Cells在中国的官方授权销售商和技术支持提供商，提供Aspose Cells控件下载、Aspose Cells授权、Aspose Cells正版产品销售等服务

在Aspose Cell要实现单元格的数据验证也是相对简单的，开发人员能够为用户提供一个选择列表、限制数据输入或者是指定数据的类型和大小，在Aspose Cell里，每个工作表类都有一个Validations对象，该对象包含了一系列验证对象，包含了下面的一些属性：

• Type:用于表示验证类型，用于指定ValidationType枚举里的类型预定值
• Operator：用于表示使用何种运算符或者运算规则，用于指定OperatorType枚举里的预定义值
• Formula1：首选的验证公式和表达式
• Formula2：次选的验证公式和表达式

数据验证类型，控件提供的ValidationType枚举有下列值：

• AnyValue 指示一个值可以是任何类型
• WholeNumber 指示验证类型只能是整数数字
• Decimal 指示验证的类型只能是小数
• List 指示验证的类型是下拉列表
• Date 指示验证的类型是日期
• Time 指示验证类型是时间
• TextLength 指示验证的类型是文本长度
• Custom 自定义验证类型

下面的事例介绍了，如何验证一定范围内的单元格输入只能是整数，具体代码如下：

ValidationCollection validations = workbook.Worksheets[0].Validations;

//Creating a Validation object
Validation validation = validations[validations.Add()];

//Setting the validation type to whole number
validation.Type = ValidationType.WholeNumber;

//Setting the operator for validation to Between
validation.Operator = OperatorType.Between;

//Setting the minimum value for the validation
validation.Formula1 = "10";

//Setting the maximum value for the validation
validation.Formula2 = "1000";

//Applying the validation to a range of cells from A1 to B2 using the
//CellArea structure
CellArea area;
area.StartRow = 0;
area.EndRow = 1;
area.StartColumn = 0;
area.EndColumn = 1;

//Adding the cell area to Validation
validation.AreaList.Add(area);

下面的事例介绍了如何使用小数数据验证：
// Create a workbook object.
Workbook workbook = new Workbook();

// Create a worksheet and get the first worksheet.
Worksheet ExcelWorkSheet = workbook.Worksheets[0];

// Obtain the existing Validations collection.
ValidationCollection validations = ExcelWorkSheet.Validations;

// Create a validation object adding to the collection list.
Validation validation = validations[validations.Add()];

// Set the validation type.
validation.Type = ValidationType.Decimal;

// Specify the operator.
validation.Operator = OperatorType.Between;

// Set the lower and upper limits.
validation.Formula1 = Decimal.MinValue.ToString();
validation.Formula2 = Decimal.MaxValue.ToString();

// Set the error message.
validation.ErrorMessage = "Please enter a valid integer or decimal number";

// Specify the validation area of cells.
CellArea area;
area.StartRow = 0;
area.EndRow = 9;
area.StartColumn = 0;
area.EndColumn = 0;

// Add the area.
validation.AreaList.Add(area);

// Set the number formats to 2 decimal places for the validation area.
for (int i = 0; i < 10; i++)
{
    ExcelWorkSheet.Cells[i, 0].GetStyle().Custom = "0.00";
}

// Save the workbook.
workbook.Save("d:\\test\\decimalvalidation.xls");

下面的事例介绍了List数据验证//注：用的较多
// Create a workbook object.
Workbook workbook = new Workbook();

// Get the first worksheet.
Worksheet worksheet1 = workbook.Worksheets[0];

// Add a new worksheet and access it.
int i = workbook.Worksheets.Add();
Worksheet worksheet2 = workbook.Worksheets[i];

// Create a range in the second worksheet.
Range range = worksheet2.Cells.CreateRange("E1", "E4");

// Name the range.
range.Name = "MyRange";

// Fill different cells with data in the range.
range[0, 0].PutValue("Blue");
range[1, 0].PutValue("Red");
range[2, 0].PutValue("Green");
range[3, 0].PutValue("Yellow");

// Get the validations collection.
ValidationCollection validations = worksheet1.Validations;

// Create a new validation to the validations list.
Validation validation = validations[validations.Add()];

// Set the validation type.
validation.Type = Aspose.Cells.ValidationType.List;

// Set the operator.
validation.Operator = OperatorType.None;

// Set the in cell drop down.
validation.InCellDropDown = true;

// Set the formula1.
validation.Formula1 = "此处是下拉列表中的数据，一般是以逗号分割的字符串";

// Enable it to show error.
validation.ShowError = true;

// Set the alert type severity level.
validation.AlertStyle = ValidationAlertType.Stop;

// Set the error title.
validation.ErrorTitle = "Error";

// Set the error message.
validation.ErrorMessage = "Please select a color from the list";

// Specify the validation area.
CellArea area;
area.StartRow = 0;
area.EndRow = 4;
area.StartColumn = 0;
area.EndColumn = 0;

// Add the validation area.
validation.AreaList.Add(area);

// Save the Excel file.
workbook.Save("d:\\test\\validationtypelist.xls");

下面的事例介绍了，如何使用日期验证：
// Create a workbook.
 Workbook workbook = new Workbook();

 // Obtain the cells of the first worksheet.
 Cells cells = workbook.Worksheets[0].Cells;

 // Put a string value into the A1 cell.
 cells["A1"].PutValue("Please enter Date b/w 1/1/1970 and 12/31/1999");

 // Wrap the text.
 cells["A1"].GetStyle().IsTextWrapped = true;

 // Set row height and column width for the cells.
 cells.SetRowHeight(0, 31);
 cells.SetColumnWidth(0, 35);

 // Get the validations collection.
 ValidationCollection validations = workbook.Worksheets[0].Validations;

 // Add a new validation.
 Validation validation = validations[validations.Add()];

 // Set the data validation type.
 validation.Type = ValidationType.Date;

 // Set the operator for the data validation
 validation.Operator = OperatorType.Between;

 // Set the value or expression associated with the data validation.
 validation.Formula1 = "1/1/1970";

 // The value or expression associated with the second part of the data validation.
 validation.Formula2 = "12/31/1999";

 // Enable the error.
 validation.ShowError = true;

 // Set the validation alert style.
 validation.AlertStyle = ValidationAlertType.Stop;

 // Set the title of the data-validation error dialog box
 validation.ErrorTitle = "Date Error";

 // Set the data validation error message.
 validation.ErrorMessage = "Enter a Valid Date";

 // Set and enable the data validation input message.
 validation.InputMessage = "Date Validation Type";
 validation.IgnoreBlank = true;
 validation.ShowInput = true;

 // Set a collection of CellArea which contains the data validation settings.
 CellArea cellArea;
 cellArea.StartRow = 0;
 cellArea.EndRow = 0;
 cellArea.StartColumn = 1;
 cellArea.EndColumn = 1;

 // Add the validation area.
 validation.AreaList.Add(cellArea);

 // Save the Excel file.
 workbook.Save("d:\\test\\datevalidation.xls");

下面的事例介绍了，如何使用文本长度验证：
// Create a new workbook.
Workbook workbook = new Workbook();

// Obtain the cells of the first worksheet.
Cells cells = workbook.Worksheets[0].Cells;

//Put a string value into A1 cell.
cells["A1"].PutValue("Please enter a string not more than 5 chars");

// Wrap the text.
cells["A1"].GetStyle().IsTextWrapped = true;

// Set row height and column width for the cell.
cells.SetRowHeight(0, 31);
cells.SetColumnWidth(0, 35);

// Get the validations collection.
ValidationCollection validations = workbook.Worksheets[0].Validations;

// Add a new validation.
Validation validation = validations[validations.Add()];

// Set the data validation type.
validation.Type = ValidationType.TextLength;

// Set the operator for the data validation.
validation.Operator = OperatorType.LessOrEqual;

// Set the value or expression associated with the data validation.
validation.Formula1 = "5";

// Enable the error.
validation.ShowError = true;

// Set the validation alert style.
validation.AlertStyle = ValidationAlertType.Warning;

// Set the title of the data-validation error dialog box.
validation.ErrorTitle = "Text Length Error";

// Set the data validation error message.
validation.ErrorMessage = " Enter a Valid String";

// Set and enable the data validation input message.
validation.InputMessage = "TextLength Validation Type";
validation.IgnoreBlank = true;
validation.ShowInput = true;

// Set a collection of CellArea which contains the data validation settings.
CellArea cellArea;
cellArea.StartRow = 0;
cellArea.EndRow = 0;
cellArea.StartColumn = 1;
cellArea.EndColumn = 1;

// Add the validation area.
validation.AreaList.Add(cellArea);

// Save the Excel file.
workbook.Save("d:\\test\\textlengthvalidation.xls");