How to create CSV Excel file C#?

I'm looking for a class for creating CSV Excel files.

Expected features:

Extremely simple to use

Escapes commas and quotes so excel handles them fine

Exports date and datetimes in timezone-proof format

Do you know any class capable of this?

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Slightly different version I wrote using reflection for my needs. I had to export a list of objects to csv. In case someone wants to use it for future.

public class CsvExport<T> where T: class
    {
        public List<T> Objects;

        public CsvExport(List<T> objects)
        {
            Objects = objects;
        }

        public string Export()
        {
            return Export(true);
        }

        public string Export(bool includeHeaderLine)
        {

            StringBuilder sb = new StringBuilder();
            //Get properties using reflection.
            IList<PropertyInfo> propertyInfos = typeof(T).GetProperties();

            if (includeHeaderLine)
            {
                //add header line.
                foreach (PropertyInfo propertyInfo in propertyInfos)
                {
                    sb.Append(propertyInfo.Name).Append(",");
                }
                sb.Remove(sb.Length - 1, 1).AppendLine();
            }

            //add value for each property.
            foreach (T obj in Objects)
            {               
                foreach (PropertyInfo propertyInfo in propertyInfos)
                {
                    sb.Append(MakeValueCsvFriendly(propertyInfo.GetValue(obj, null))).Append(",");
                }
                sb.Remove(sb.Length - 1, 1).AppendLine();
            }

            return sb.ToString();
        }

        //export to a file.
        public void ExportToFile(string path)
        {
            File.WriteAllText(path, Export());
        }

        //export as binary data.
        public byte[] ExportToBytes()
        {
            return Encoding.UTF8.GetBytes(Export());
        }

        //get the csv value for field.
        private string MakeValueCsvFriendly(object value)
        {
            if (value == null) return "";
            if (value is Nullable && ((INullable)value).IsNull) return "";

            if (value is DateTime)
            {
                if (((DateTime)value).TimeOfDay.TotalSeconds == 0)
                    return ((DateTime)value).ToString("yyyy-MM-dd");
                return ((DateTime)value).ToString("yyyy-MM-dd HH:mm:ss");
            }
            string output = value.ToString();

            if (output.Contains(",") || output.Contains("""))
                output = '"' + output.Replace(""", """") + '"';

            return output;

        }
    }

Usage sample : (updated per comment)

CsvExport<BusinessObject> csv= new CsvExport<BusinessObject>(GetBusinessObjectList());
Response.Write(csv.Export());

---

Please forgive me

But I think a public open-source repository is a better way to share code and make contributions, and corrections, and additions like "I fixed this, I fixed that"

So I made a simple git-repository out of the topic-starter's code and all the additions:

https://github.com/jitbit/CsvExport

I also added a couple of useful fixes myself. Everyone could add suggestions, fork it to contribute etc. etc. etc. Send me your forks so I merge them back into the repo.

PS. I posted all copyright notices for Chris. @Chris if you're against this idea - let me know, I'll kill it.

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读取和写入CSV文件的另一个好方法是filehelpers（开源）。

链接地址: http://www.djcxy.com/p/35690.html

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