Olika sätt att öppna filer
Öppna en fil via en sökväg
Utvecklare kan öppna en Microsoft Excel-fil med dess sökväg på den lokala datorn genom att ange den i**Arbetsbok**klass konstruktör. Passera helt enkelt vägen i konstruktorn som en*sträng*. Aspose.Cells kommer automatiskt att upptäcka filformatstypen.
// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET | |
// The path to the documents directory. | |
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); | |
// Opening through Path | |
// Creating a Workbook object and opening an Excel file using its file path | |
Workbook workbook1 = new Workbook(dataDir + "Book1.xlsx"); | |
Console.WriteLine("Workbook opened using path successfully!"); |
Öppna en fil via en ström
Det är också enkelt att öppna en Excel-fil som en stream. För att göra det, använd en överbelastad version av konstruktorn som tarStrömobjekt som innehåller filen.
// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET | |
// The path to the documents directory. | |
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); | |
// Opening through Stream | |
// Create a Stream object | |
FileStream fstream = new FileStream(dataDir + "Book2.xls", FileMode.Open); | |
// Creating a Workbook object, open the file from a Stream object | |
// That contains the content of file and it should support seeking | |
Workbook workbook2 = new Workbook(fstream); | |
Console.WriteLine("Workbook opened using stream successfully!"); | |
fstream.Close(); |
Öppna en fil med endast data
För att öppna en fil med endast data, använd**LoadOptions** och**LoadFilter**klasser för att ställa in det relaterade attributet och alternativen för klasserna för mallfilen som ska laddas.
// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET | |
// The path to the documents directory. | |
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); | |
// Load only specific sheets with data and formulas | |
// Other objects, items etc. would be discarded | |
// Instantiate LoadOptions specified by the LoadFormat | |
LoadOptions loadOptions = new LoadOptions(LoadFormat.Xlsx); | |
// Set LoadFilter property to load only data & cell formatting | |
loadOptions.LoadFilter = new LoadFilter(LoadDataFilterOptions.CellData); | |
// Create a Workbook object and opening the file from its path | |
Workbook book = new Workbook(dataDir + "Book1.xlsx", loadOptions); | |
Console.WriteLine("File data imported successfully!"); |
Laddar endast synliga ark
När du laddar en**Arbetsbok**ibland behöver du kanske bara data i synliga kalkylblad i en arbetsbok. Aspose.Cells låter dig hoppa över data i osynliga kalkylblad medan du laddar en arbetsbok. För att göra detta, skapa en anpassad funktion som ärver**LoadFilter**klass och skicka sin instans till**LoadOptions.LoadFilter**fast egendom.
// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET | |
// The path to the documents directory. | |
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); | |
string sampleFile = "output.xlsx"; | |
string samplePath = dataDir + sampleFile; | |
// Create a sample workbook | |
// and put some data in first cell of all 3 sheets | |
Workbook createWorkbook = new Workbook(); | |
createWorkbook.Worksheets["Sheet1"].Cells["A1"].Value = "Aspose"; | |
createWorkbook.Worksheets.Add("Sheet2").Cells["A1"].Value = "Aspose"; | |
createWorkbook.Worksheets.Add("Sheet3").Cells["A1"].Value = "Aspose"; | |
createWorkbook.Worksheets["Sheet3"].IsVisible = false; | |
createWorkbook.Save(samplePath); | |
// Load the sample workbook | |
LoadOptions loadOptions = new LoadOptions(); | |
loadOptions.LoadFilter = new CustomLoad(); | |
Workbook loadWorkbook = new Workbook(samplePath, loadOptions); | |
Console.WriteLine("Sheet1: A1: {0}", loadWorkbook.Worksheets["Sheet1"].Cells["A1"].Value); | |
Console.WriteLine("Sheet1: A2: {0}", loadWorkbook.Worksheets["Sheet2"].Cells["A1"].Value); | |
Console.WriteLine("Sheet1: A3: {0}", loadWorkbook.Worksheets["Sheet3"].Cells["A1"].Value); |
Här är genomförandet avCustomnLoadklass som hänvisas till i ovanstående utdrag.
// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET | |
class CustomLoad : LoadFilter | |
{ | |
public override void StartSheet(Worksheet sheet) | |
{ | |
if (sheet.IsVisible) | |
{ | |
// Load everything from visible worksheet | |
this.LoadDataFilterOptions = LoadDataFilterOptions.All; | |
} | |
else | |
{ | |
// Load nothing | |
this.LoadDataFilterOptions = LoadDataFilterOptions.Structure; | |
} | |
} | |
} |