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Posted 21 Jan 2015
Licenced CPOL

Extension Method for Generic List Collection to DataTable

, 21 Jan 2015
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Extension method for Generic Collection to DataTable

Introduction

This code will help you to get the Extension method for GenericType Collection List for converting them to DataTable.

Background

You must know / may not know about extension method, but using this code class file you can use it without any changes.

Using the Code

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;

namespace coDEalers
{
    public static class Extension
    {
        public static DataTable ListToDataTable<T>(this IList<T> data, string tableName)
        {
            DataTable table = new DataTable(tableName);

            //special handling for value types and string
            if (typeof(T).IsValueType || typeof(T).Equals(typeof(string)))
            {

                DataColumn dc = new DataColumn("Value");
                table.Columns.Add(dc);
                foreach (T item in data)
                {
                    DataRow dr = table.NewRow();
                    dr[0] = item;
                    table.Rows.Add(dr);
                }
            }
            else
            {
                PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
                foreach (PropertyDescriptor prop in properties)
                {
                    table.Columns.Add(prop.Name, 
                    Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType);
                }
                foreach (T item in data)
                {
                    DataRow row = table.NewRow();
                    foreach (PropertyDescriptor prop in properties)
                    {
                        try
                        {
                            row[prop.Name] = prop.GetValue(item) ?? DBNull.Value;
                        }
                        catch (Exception ex)
                        {
                            row[prop.Name] = DBNull.Value;
                        }
                    }
                    table.Rows.Add(row);
                }
            }
            return table;
        }
    }
}

Points of Interest

This is an easy way for getting GenericList collection to DataTable.

Usage

DataTable dt = null;
List<StateList> stateListObj = JsonConvert.DeserializeObject<List<StateList>>(hdn_stateDetails_JSON.Value);
dt = stateListObj.ListToDataTable<StateList>("dtState");

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

MahendraChawhan
CEO coDEalers
India India
No Biography provided

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Comments and Discussions

 
QuestionAn Alternative Approach Pin
George Swan21-Jan-15 18:06
memberGeorge Swan21-Jan-15 18:06 
GeneralThoughts Pin
PIEBALDconsult21-Jan-15 17:45
protectorPIEBALDconsult21-Jan-15 17:45 
NewsMy 4 and link to an other article Pin
Jérôme VIBERT21-Jan-15 2:05
memberJérôme VIBERT21-Jan-15 2:05 

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