3rdpartylibs/fastreports.wpf/FastReport/Data/CsvDataConnection.DesignExt.cs

using System;
using System.Data;
using System.IO;
using System.Net;
using FastReport.Data.ConnectionEditors;
using FastReport.Utils;

namespace FastReport.Data
{
    partial class CsvDataConnection
    {
        #region Public Methods

        /// <inheritdoc/>
        public override void TestConnection()
        {
            using (DataSet dataset = CreateDataSet())
            {
            }
        }

        /// <inheritdoc/>
        public override ConnectionEditorBase GetEditor()
        {
            return new CsvConnectionEditor();
        }

        /// <inheritdoc/>
        public override string GetConnectionId()
        {
            return "Csv: " + CsvFile;
        }

        #endregion Public Methods

        #region Private Methods

        /// <inheritdoc/>
        private string CheckForChangeConnection(CsvConnectionStringBuilder builder)
        {
            RelatedPathCheck(builder);

            if (File.Exists(builder.CsvFile))
            {
                ConnectionString = builder.ToString();
                return ConnectionString;
            }

            else
            {
                // added a check for the existence of a file when it is changed in the connection string in the properties (the CsvFile property)
                // from the local path to the uri.
                // the data in the table changes, but the name and list of fields on the "Data" tab do not change

                // the same thing happens when changing from a local path to another local path
                Uri uri = new Uri(builder.CsvFile);
                WebRequest request = WebRequest.Create(uri);
                try
                {
                    using (WebResponse response = request.GetResponse())
                    {
                        ConnectionString = builder.ToString();
                        return ConnectionString;
                    }
                }
                catch
                {
                    builder.CsvFile = ConnectionString;
                    FRMessageBox.Error(Res.Get("ConnectionEditors,Common,ErrorUrlException"));
                    return ConnectionString;
                }
            }
        }
        #endregion Private Methods
    }
}