填充 <string> 列表或数组以将元素名称导出到 excel

Posted 2023-04-13

【中文标题】填充 <string> 列表或数组以将元素名称导出到 excel

【英文标题】：Filling <string> list or array to export element names to excel

【发布时间】：2021-11-30 19:40:26

【问题描述】：

目标是用元素名称填充 excel 单元格。使用 EPPlus。

_elementsDB 仅提供“Autodesk.Revit.DB.Wall”。

int col = 1;
for ( int row=2; row < _elementsDB.Count; row++ )
                
ws.Cells[row, col].Value = _elementsDB;

绑定填充数组或列表。没有任何效果。

FilteredElementCollector collector = new FilteredElementCollector(doc);
IList<Element> _elementsDB = collector.OfCategory(BuiltInCategory.OST_Walls).WhereElementIsNotElementType().ToElements();
List<Element> _elementsDB = collector.OfCategory(BuiltInCategory.OST_Walls).WhereElementIsNotElementType().ToElements();

//First Option
string[] _elementsNameArr = new string[]  ;
foreach (Element e in _elementsDB)


    _elementsNameArr = e.Name;


//Second Option
List <string> _elementsNameList = new List<string>;
foreach (Element e in _elementsDB)


    _elementsNameList = e.Name;

还尝试创建一个排序列表，也没有工作。显示一个 excxeption System.Argument.Exception "A record with such key already exists"。

SortedList<string, Element> _elementNameSorted = new SortedList<string, Element>();

            foreach (Element e in _elementsDB)
            
                _elementNameSorted.Add(e.Name,e);
            

【参考方案1】：

当你使用.ToElements()方法时，它返回一个IList<Element>，你可以稍后转换它，你不能直接将它的结果分配给List<Element>，你必须使用LINQ来转换，使用.ToElements().ToList()

如果您还没有，请务必将using System.Linq; 添加到您的代码顶部。

反正这里不用转成List<Element>，试试下面的代码：

FilteredElementCollector collector = new FilteredElementCollector(doc);
IList<Element> _elementsDB = collector.OfCategory(BuiltInCategory.OST_Walls).WhereElementIsNotElementType().ToElements();
//List<Element> _elementsDB = collector.OfCategory(BuiltInCategory.OST_Walls).WhereElementIsNotElementType().ToElements(); // <---- IF YOU ALREADY DECLARED _elementsDB BEFORE, YOU CAN'T HAVE THIS HERE TOGETHER

List <string> _elementsNameList = new List<string>(); // <-- YOU'VE MISSED () HERE
foreach (Element e in _elementsDB)

    _elementsNameList.Add(e.Name); // <-- HERE YOU HAVE TO ADD IT TO THE LIST, NOT ASSIGN TO THE LIST, YOU CANNOT ASSIGN A string TO A List<string>, YOU HAVE TO ADD


//Sorting your list would be
_elementsNameList = _elementsNameList.OrderBy(q => q).ToList();

//...... Write here if you have any code before writing the Excel

try

    WriteXLS("YOU EXCEL FILE PATH HERE", "YOUR WORKSEET NAME HERE", _elementsNameList, 2); // <--- METHOD SOWN IN THE CODE BELOW

catch(Exception e)

    TaskDialog.Show("Error", e.Message);

要写入现有的 Excel 文件，您可以使用以下方法：

private void WriteXLS(string filePath, string workSheetName, List<string> elementsNamesList, int startRow = 1, int col = 1)

    FileInfo existingFile = new FileInfo(filePath);
    using (ExcelPackage package = new ExcelPackage(existingFile))
    
        ExcelWorksheet ws = GetWorkSheet(package, workSheetName);
        int maxRows = elementsNamesList.Count;
        for (int row = startRow; row <= maxRows; row++)
        
            ws.Cells[row, col].Value = elementsNamesList[row];
        
    

并且，在运行它之前，一定要关闭你的Excel文件，如果文件打开它就不起作用。