Seamlex.Utilities.ExcelToData 1.0.2

ExcelToData

Convert to-and-from simple Excel files and .NET data objects

Usage

Sample code to manipulate List<t>, byte[], and DataTable objects is below.

Version History

1.0.0 Initial release

1.0.1 Fixed bugs:

1 - name of method public List<T> ToDataTable<T> should be ToListData<T>

• fixed

2 - GetDefaults() returns the internal settings object and not a clone

• removed GetDefaults()
• added GetOptionsClone()

3 - Error where List<T> has non-CLR types

• fixed
• will convert to-and-from Json and put this into the xlsx column
• this is the default behaviour, change it with: xlsx.GetOptions().ComplexToJson = false;

1.0.2 Fixed columns and allowed indexes for sheets

4 - fixed to check header row for merged, missing, and duplicated field names https://github.com/simonnjwalker/ExcelToData/issues/4

5 - added sheet indexes to ToDataTable() https://github.com/simonnjwalker/ExcelToData/issues/5

Sample code

// this is a dotnet 7 console application #pragma warning disable CS1998 internal class Program { // the Main method will complain about lacking awaits private static async Task Main(string[] args) { // set sample file names (MS Windows) string output = @"c:\temp\test1.xlsx"; string output2 = @"c:\temp\test2.xlsx";

    // instantiate this class
    var xlsx = new Seamlex.Utilities.ExcelToData();

    // create some demo data in a List<T>
    var clients = new List<MyClass>(){
        new MyClass() { IsValid = false, DollarAmount = 123.45, StartDate = DateTime.Now.AddDays(7), EndDate = DateTime.Now.AddMonths(3), FirstName = "Asha", LastName = "Albatross", MyProp = new ClassProp(){IsValid=true, DollarAmount=2.50}  },
        new MyClass() { IsValid = true, DollarAmount = 400.00, StartDate = DateTime.Now.AddDays(14), EndDate = DateTime.Now.AddMonths(4),FirstName = "Bianca", LastName = "Best", MyProp = new ClassProp(){IsValid=false, DollarAmount=0.50}  },
        new MyClass() { IsValid = false, DollarAmount = 100.00, StartDate = DateTime.Now.AddDays(21), EndDate = DateTime.Now.AddMonths(5), FirstName = "Carl", LastName = "Cranston", MyProp = new ClassProp(){IsValid=true, DollarAmount=1.50} }
    };

    // this changes default behaviour of the client which outputs as text to all fields 
    //xlsx.GetOptions().ColumnsToDateTime.Add("StartDate");
    //xlsx.GetOptions().ColumnsToNumber.Add("DollarAmount");

    // this creates an Excel file from a .NET List<T>
    xlsx.ToExcelFile(clients, output);

    // this displays the last error (if any)
    if (xlsx.ErrorMessage != "")
    Console.WriteLine(xlsx.ErrorMessage);

    // this loads an Excel file into a System.Data.DataTable object
    var dt = xlsx.ToDataTable(output);

    // this saves it to a second file
    xlsx.ToExcelFile(dt, output2);

    // this reloads that second file into an in-memory byte array
    byte[] file = xlsx.ToExcelBinary(output2);

    // this takes the in-memory object and converts it to a List<T> then outputs
    // to the console
    var list2 = xlsx.ToListData<MyClass>(file);
    foreach (var item in list2)
    Console.WriteLine(
        $"{item.FirstName} {item.LastName} {item.StartDate} {item.EndDate} {item.DollarAmount} {item.MyProp.DollarAmount} ");

    return;
}

}

// demo class with a combination of fields and properties public class MyClass { public bool IsValid = false; public double DollarAmount { get; set; } public DateTime StartDate = DateTime.Now; public DateTime? EndDate { get; set; } public string FirstName = ""; public string LastName = "";

public ClassProp MyProp = new ClassProp();

}

public class ClassProp { public bool IsValid = false; public double DollarAmount { get; set; }

}