[英]C# ExcelPackage (EPPlus) DeleteRow does not change sheet dimension?
[英]How to close ExcelPackage using EPPlus in C#?
我正在使用epplus在Excel模板中向文件中寫入大量信息,但是隨后我需要關閉ExcelPackage以便與Excel應用程序一起使用。 它引發了以下異常:“ System.Runtime.InteropServices.COMException(0x800A03EC):HRESULT異常:0x800A03EC”
private void FillCardsSheet()
{
xlPackage = new ExcelPackage(Template);
wsCards = xlPackage.Workbook.Worksheets[4];
string command = "SELECT * FROM dbo_serial_cards WHERE type <> 'EXT' AND LEFT([device_tag], 2) <> '!!'";
OleDbCommand cmd = new OleDbCommand(command, CON);
OleDbDataReader reader = cmd.ExecuteReader();
int row = 1;
while (reader.Read())
{
row++;
for (int col = 1; col <= 16; col++)
{
wsCards.Cells[row, col].Value = reader.GetValue(col - 1);
}
}
xlPackage.SaveAs(Template);
xlPackage.Dispose();
}
如果沒有有關連接和對象的更多詳細信息,很難說。 什么是“模板”? 如果您說哪一行會產生錯誤,可能會有所幫助(例如提到的@mason)。 那是您似乎正在得到的COM錯誤,所以它可能與數據庫連接或程序包本身有關。 由於包是在方法外部進行管理的,因此請確保未鎖定或關閉它。
這對我連接到本地SQL Server數據庫的工作正常:
[TestMethod]
public void SQL_Reader_Test()
{
var Template = new FileInfo(@"c:\temp\temp.xlsx");
if (Template.Exists)
Template.Delete();
var xlPackage = new ExcelPackage(Template);
//var wsCards = xlPackage.Workbook.Worksheets[4];
var wsCards = xlPackage.Workbook.Worksheets.Add("Cards");
//const string constring = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\temp\northwind.mdb;Persist Security Info=False;";
const string constring = @"Provider=SQLNCLI11;Data Source=MYMACHINENAME\SQLEXPRESS;Initial Catalog=AdventureWorks;UID=AdventureWorks; Pwd=AdventureWorks";
using (var CON = new OleDbConnection(constring))
{
CON.Open();
//string command = "SELECT * FROM dbo_serial_cards WHERE type <> 'EXT' AND LEFT([device_tag], 2) <> '!!'";
const string command = "SELECT * FROM Person.Address";
var cmd = new OleDbCommand(command, CON);
var reader = cmd.ExecuteReader();
int row = 1;
while (reader.Read())
{
row++;
//for (int col = 1; col <= 16; col++)
for (int col = 1; col <= reader.FieldCount; col++)
{
wsCards.Cells[row, col].Value = reader.GetValue(col - 1);
}
}
xlPackage.SaveAs(Template);
xlPackage.Dispose();
}
}
嘗試在Using-Block中使用ExcelPackage:
using (ExcelPackage xlsPackage = new ExcelPackage(Template))
{
// Your Code
xlPackage.SaveAs(Template);
}
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