Iterating through and Populating Named Ranges in Excel - c#

I have a WinForms app written in C# and I want to programmatically export some data into the some named ranges in an Excel Template. I've looked on these forums and elsewhere and the closest code I can find to what I want is as follows -
private Excel.Workbook m_workbook;
object missing = Type.Missing;
public void testNamedRangeFind()
{
m_workbook = Globals.ThisAddIn.Application.ActiveWorkbook;
int i = m_workbook.Names.Count;
string address = "";
string sheetName = "";
if (i != 0)
{
foreach (Excel.Name name in m_workbook.Names)
{
string value = name.Value;
//Sheet and Cell e.g. =Sheet1!$A$1 or =#REF!#REF! if refers to nothing
string linkName = name.Name;
//gives the name of the link e.g. sales
if (value != "=#REF!#REF!")
{
address = name.RefersToRange.Cells.get_Address(true, true, Excel.XlReferenceStyle.xlA1, missing, missing);
sheetName = name.RefersToRange.Cells.Worksheet.Name;
}
Debug.WriteLine("" + value + ", " + linkName + " ," + address + ", " + sheetName);
}
}
}
However I get an error saying 'The name Globals does not exist in the current context'.
Can someone please explain what it is I am not understanding about this code, or alternatively point me at some other code that will enable me to post values from my Database into the Excel Template named ranges.

This code runs on VSTO (Visual Studio Tools for Office) and uses the Microsoft.Office.Interop.Excel.
So you should create an Office Excel Workbook solution in Visual Studio:
File -> New -> Visual C# -> Office -> [ Select your Office version ] -> Excel Workbook

Related

How to dynamically load an Assembly Into My C# program, .NET Framework 4.7

I'm building an Excel to .bin console app using NPOI, what I'm looking to do is compare read data to to the class one, let me explain better...
If I have an Excel file : Sample.xlxs
_valueOne
_valueTwo
0.0f
testString
Then with my app I'll convert it into a Datatable (then serialize it) but I'll check for any error on the Excel file before I'll write the Datatable, for example in the final class that will be:
public class Sample
{
public float _valueOne;
public string _valueTwo;
}
I want to load this class to compare the value got from the Excel file to find some error (like is a string instead a float)
Final classes are contained in another project, so I would like to know if there is a way to "import" it.
Actually I'm using
private static System.Type GetType(
string in_assemblyPath,
string in_className)
{
System.Type typeCur
= System.Type.GetType(in_className);
if (typeCur != null)
{
return typeCur;
}
else
{
Debug.WriteLine(in_assemblyPath + "/" + in_className + ".cs");
try
{
System.Reflection.Assembly asm
= Assembly.LoadFrom(in_assemblyPath + "/" + in_className + ".cs");
typeCur
= asm.GetType(in_className);
if (typeCur != null)
{
return typeCur;
}
}catch(Exception ex )
{
Debug.WriteLine(">>>>>>>>>>> " + "Error On Assembly Load"+" <<<<<<<<<" );
Debug.WriteLine(ex.StackTrace);
Debug.WriteLine(ex.Message);
Debug.WriteLine(">>>>>>>>>>> " + "End Error Report" + " <<<<<<<<<");
}
}
return null;
}
but I got an error message that say : The module was expected to contain an assembly manifest.
If you are using visual studio: you need to go to your project, go to reference > Right Click > Add reference. In the window that appears select Project, and then select the project that contains classes. Then save.
EDIT: if you want to add it in a dynamic way, then, as #Romka suggested use something like this:
var MainAssembly = Assembly.Load("yourpathtodll.dll");
Type t = MainAssembly.GetType("Yournamespace." + filename);
var finalobj = Activator.CreateInstance(t);
Then you can use reflection the get fields and properties.

Method in Service that uses excel isn't saving and doesn't appear to produce an exception

I have a problem with some code in a service I have. The method just creates a datatable of the report that needs to be created and then writes it to an existing excel file. The problem is that it fails at the save of the file. Somewhat more oddly, it doesn't appear to be catching errors, and I don't know why. I've included the code below. Of note:
excel.Visible=true; doesn't seem to make the excel sheet visible each time so I can't really watch what's going on in the excel itself. I assume it's not becoming visible because it's a service, but I don't really know.
I know that the datatable is producing output as I've had the log (Which is just a text file where I can write events and errors) writes both the cells value and it's location and it has never stopped in the Foreach loop or the for loop within it
I know that it's failing at the wb.Save(); because the Log.WriteLine("WriteTIByEmp 4"); successfully writes to the text file, but the Log.WriteLine("WriteTIByEmp 5"); does not.
The catch (Exception ex) also doesn't seem to be working, as it doesn't write anything about the exception but doesn't even write the Log.WriteLine("Catching Exception");, so I'm a bit lost.
Edit: Just to note, this is all using Interops in the excel portion. It's just that the "using Microsoft.Office.Interop.Excel" is declared at the top of the class to save time and typing as almost all the methods in this particular class are using excel. The excel file is always opening in this process, I can see it in the task manager, and I have had other methods successfully write to excel files in this process. Only this particular method has had issues.
public void WriteTIByEmp(CI.WriteReport Log)
{
try
{
System.Data.DataTable Emps = Pinpoint.TICardsByEmpStatsDaily.GetTICardsByEmployer();
Log.WriteLine("WriteTIByEmp 1");
Application excel = new Application();
excel.Visible = true;
Workbook wb = excel.Workbooks.Open(TIEMPPath);
Worksheet ws = wb.Worksheets[1];
ws.Range["A:G"].Clear();
Log.WriteLine("WriteTIByEmp 2");
int RowNum = 0;
int ColCount = Emps.Columns.Count;
Log.WriteLine("WriteTIByEmp 3");
foreach (DataRow dr in Emps.Rows)
{
RowNum++;
for (int i = 0; i < ColCount; i++)
{
ws.Cells[RowNum, i + 1] = dr[i].ToString();
Log.WriteLine("Cell Val:" + dr[i].ToString() + ". Cell Location: " + RowNum + "," + i);
}
}
Log.WriteLine("WriteTIByEmp 4");
wb.Save();
Log.WriteLine("WriteTIByEmp 5");
wb.Close();
Log.WriteLine("WriteTIByEmp 6");
excel = null;
Log.WriteLine("WriteTIByEmp 7");
}
catch (Exception ex)
{
Log.WriteLine("Catching Exception");
var st = new StackTrace(ex, true);
var frame = st.GetFrame(0);
var line = frame.GetFileLineNumber();
string msg = "Component Causing Error:" + ex.Source + System.Environment.NewLine + "Error Message: " + ex.Message + System.Environment.NewLine + "Line Number: " + line + System.Environment.NewLine + System.Environment.NewLine;
Log.WriteLine(msg, true);
}
}
Meaby try to use Interops
i don't understand how Your code can start Excel application
by this line :
Application excel = new Application();
try this
Microsoft.Office.Interop.Excel.Application xlexcel;
xlexcel = new Microsoft.Office.Interop.Excel.Application();
xlexcel.Visible = true;
I have been in similar situation.
Note: While using Interop Excel is a dependency as well as other processes accessing the file could cause issues. Therefore, I recommend using EPPlus Nuget Package as it works wonders.
https://www.nuget.org/packages/EPPlus/
Please refer to the below sample code.
FileInfo fi = new FileInfo(ExcelFilesPath + "myExcelFile.xlsx");
using (ExcelPackage pck = new ExcelPackage())
{
// Using Existing WorkSheet 1.
ExcelWorksheet ws = pck.Workbook.Worksheets[1];
// Loading Data From DataTable Called dt.
ws.Cells["A1"].LoadFromDataTable(dt, true);
// If you want to enable auto filter
ws.Cells[ws.Dimension.Address].AutoFilter = true;
// Some Formatting
Color colFromHex = System.Drawing.ColorTranslator.FromHtml("#00B388");
ws.Cells[ws.Dimension.Address].Style.Fill.PatternType = ExcelFillStyle.Solid;
ws.Cells[ws.Dimension.Address].Style.Fill.BackgroundColor.SetColor(colFromHex);
ws.Cells[ws.Dimension.Address].Style.Font.Color.SetColor(Color.White);
ws.Cells[ws.Dimension.Address].Style.Font.Bold = true;
ws.Cells["D:K"].Style.Numberformat.Format = "0";
ws.Cells["M:N"].Style.Numberformat.Format = "mm-dd-yyyy hh:mm:ss";
ws.Cells[ws.Dimension.Address].AutoFitColumns();
pck.SaveAs(fi);
}
You can refer to the above code from my project. I am loading the DataTable data into my excel file by providing the Range or Starting Cell.
I had found the issue. The Excel file was open on someone else's computer which resulted in it not being able to save the file, but it couldn't display the excel popup because excel wouldn't become visible (I still don't know why but Probably something to do with it being a service). So it just couldn't save but it wasn't a code error so it didn't show up in the log and couldn't continue so the code was just stuck. I'll make a copy for the purposes of updating in the future.

C# Run Excel Macro Through IIS Server

I have a C# (using Razor) Web Application that runs through my company's intranet.
I have been using ClosedXML to manage all of my Excel needs and it works great, however, now I need to run Macros inside Excel Files and apparently ClosedXML cannot do this, so I must use Excel Interop.
My code below gives the dreaded:
Microsoft Excel cannot access the file ... There are several possible
reasons: • The file name or path does not exist. • The file is being
used by another program. • The workbook you are trying to save has the
same name as a currently open workbook.
The file name and path DOES exist
I made sure that Excel is not even running on the server
The workbook is not open (see above).
Things I've tried.
I've tried to create security provisions for the C:\Windows\System32\config\systemprofile and SysWOW64\config\systemprofile.
(Side Note: I could not find IIS_USRS when I tried to add the security provisions - this may be the problem.)
I've also tried editing the Excel Application properties via dcomcnfg and I still get the same error.
here's what I'm trying to do:
//C# with Razor Syntax
#using MSExcel = Microsoft.Office.Interop.Excel
#using System.Runtime.InteropServices
#using System.Web
#using System.IO
string worksheetName = "Sheet1";
string[] macros = new string[] { "Module1.Reset_List()", "Module1.Run_Setup()"};
string workbookPath = HttpContext.Current.Server.MapPath(#"~/uploads/test.xlsm");
FileInfo xlsFile = new FileInfo(workbookPath);
string msg = (File.Exists(xlsFile.FullName)) ? "Found It!" : "Can't Find It...";
<p>#msg</p>; // <-- This always returns "Found It!"
//Create the Excel Object
MSExcel.Application xlsApp = new MSExcel.Application();
xlsApp.Visible = true;
try
{
//Identify the workbook (open the file)
// *** the error occurs on the line below *** //
MSExcel.Workbook xlsBook = xlsApp.Workbooks.Open(xlsFile.FullName);
xlsBook.Activate();
//Identify the worksheet
MSExcel.Worksheet xlsSheet = (MSExcel.Worksheet)xlsBook.Sheets[worksheetName];
xlsSheet.Activate();
foreach (string macro in macros)
{
xlsApp.Run(macro);
}
xlsBook.Save();
xlsBook.Close(false, "", false);
xlsApp.Quit();
}
catch (Exception e)
{
<p>#e.Message</p>
Marshal.ReleaseComObject(xlsApp);
xlsApp = null;
}
if (xlsApp != null)
{
Marshal.ReleaseComObject(xlsApp);
xlsApp = null;
}

Working with C# and Excel Interop

I have this code:
Microsoft.Office.Interop.Excel.Application xla = new Microsoft.Office.Interop.Excel.Application();
xla.Visible = false;
Workbook wb = xla.Workbooks.Add(XlSheetType.xlWorksheet);
Worksheet ws = (Worksheet)xla.ActiveSheet;
ws.Name = "Serial";
int i = 1;
foreach (DataRow comp in dsView.Tables[0].Rows)
{
ws.Cells[i, 1] = "'" + comp[0].ToString();
ws.Cells[i, 2] = "'" + comp[1].ToString();
ws.Cells[i, 3] = "'" + comp[2].ToString();
i++;
}
if (File.Exists(#"d:\DDD.xlsx"))
File.Delete(#"d:\DDD.xlsx");
xla.Save(#"d:\DDD.xlsx"); ---->>>> on this line i get the error
The error:
Exception from HRESULT: 0x800A03EC
I am working on C# winforms with Office 2012
Your problem is that the variable xla is your excel application and not a workbook. You want to save the workbook.
so
xla.Save(#"d:\DDD.xlsx"); ---->>>> on this line i get the error
should be
wb.SaveAs(#"d:\DDD.xlsx", System.Reflection.Missing.Value,System.Reflection.Missing.Value,System.Reflection.Missing.Value,
System.Reflection.Missing.Value,System.Reflection.Missing.Value,Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange,System.Reflection.Missing.Value,
System.Reflection.Missing.Value,System.Reflection.Missing.Value,System.Reflection.Missing.Value,System.Reflection.Missing.Value);
When I run Excel.Application.Save() with Visual Studio 2010 and Excel 2010 interop (Office 14) targeting .NET 4, it displays a dialog to select a location to save the file. Clicking Cancel on that dialog results in a COM exception. But clicking Save has odd results: When I supply a valid file path and name as a parameter like Excel.Application.Save(#"C:\blah.xlsx"), I end up with two files saved. The first is named Sheet1.xlsx and contains what I'd expect, even though I didn't choose that name in the dialog. The other is named blah.xlsx (as per my file name parameter) and won't open correctly in Excel. If I call Excel.Application.Save() without a file name as a parameter, a valid file is saved with the name and path I selected in the dialog, but I also get a "RESUME.XLW" file as well. So it seems that the Application.Save method may not be a good choice to use. Instead, you can do something like this, which works as you'd expect:
using System;
using Excel = Microsoft.Office.Interop.Excel;
namespace WindowsFormsApplication2
{
static class Program
{
static void Main()
{
Excel.Application xlApp = new Excel.Application();
Excel.Workbook book = xlApp.Workbooks.Add(Excel.XlSheetType.xlWorksheet);
Excel.Worksheet sheet = book.ActiveSheet;
sheet.Name = "Booya";
Excel.Range range = sheet.Cells[1, 1];
range.Value = "This is some text";
book.SaveAs(#"C:\blah.xlsx");
}
}
}

Excel Template: Merging data and saving workbooks

I am on my first foray into Excel Interop and after a flying start have hit a wall.
I have an Excel template that contains one sheet which is an assessment form and another which contains guidance notes for how to carry out the assessment.
I also have an XML file with the details of the projects being assessed.
I need to merge the project title, application number and company name into the first sheet and then save the sheet with the filename [Application No] - [Project Title].xlsx.
The first part is working fine. I have Loaded the XML and the code is putting the data into the form where it should be.
My problem is the saving part. I found the .SaveAs method and it creates a couple of files... but they won't open. I then get a HRESULT error 0x800A03EC - Searching the web has explained nothing about this. Something is telling me that this.SaveAs() is referring to the worksheet rather than the work book but I am just guessing there.
I am hoping I have done something stupid and it is an easy fix.
For reference here is my code but like I say I am not sure how useful it is.
private void MergeData()
{
doc.Load(#"C:\XML Data\source.xml");
XmlNodeList forms = doc.SelectNodes("//form1");
for (int i = 0; i < forms.Count; i++)
{
XmlNodeList nodes = forms[i].ChildNodes;
string refNo = nodes[0].InnerText.ToString();
string companyName = nodes[3].InnerText.ToString();
string title = nodes[1].InnerText.ToString();
this.Cells[9, 4] = title;
this.Cells[11, 4] = refNo;
this.Cells[14, 4] = companyName;
this.SaveAs(#"C:\Assessment Forms\" + refNo + " - " + title + ".xlsx");
}
}
Does anyone know how to save these files?
Thanks for reading
EDIT--
I have found this article
C# and Excel Interop issue, Saving the excel file not smooth
and changed the code to include its suggestion
Excel.Application app = this.Application;
Excel.Workbook wb = app.Workbooks.Add(missing);
wb.SaveAs(#"C:\Assessment Forms\" + refNo + " - " + title + ".xlsx");
But it is doing the same.
I am on a deadline so think I am going to have to start copying, pasting and saving manually :(
Not sure what object this is here, but if you are correct in assuming this is a worksheet, try this.Parent.SaveAs
Alternatively if this turns out to be a range, try this.Worksheet.Parent.SaveAs

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