How to Add a shapefile data to postgis(postgres) using c# - gis

Question

am trying to add shapefile data to postgis using c#
string path = browse_path.Text;
ProcessStartInfo startInfo = new ProcessStartInfo("CMD.exe");
Process p = new Process();
startInfo.RedirectStandardInput = true;
startInfo.UseShellExecute = false;
startInfo.RedirectStandardOutput = true;
startInfo.RedirectStandardError = true;
p = Process.Start(startInfo);
string chgdir = #"chdir " + #"C:\Program Files\PostgreSQL\9.4\bin\";
p.StandardInput.WriteLine(chgdir);
string pass = #"set PGPASSWORD=postgres";
p.StandardInput.WriteLine(pass);
string cmd = #"shp2pgsql -I -s 4326 " + path + " public.states | psql -U postgres -d postgres";
p.StandardInput.WriteLine(cmd);
p.WaitForExit();
p.Close();`
and for waiting almost 7-8 mins its not working. my shp file is 160 kb only.. but the command is working fine if i run it in the cmd rather then using code..

Answer 1

This is a function I wrote to import shapefiles to PG. It uses Nuget packages CliWrap and Npgsql and I just copied shp2pgsql and its dependencies to a project folder 'Tools' so it can be run on a machine that doesn't have PostgreSQL installed. Its a bit messy and you might need to add error handling but it worked for my needs.
public async static Task<bool> OutputSHPtoPSGLAsync(string shpfile, string host, string user, string pwd, string db, string schema = "public", bool dropIfExists = true, string table = "[SHPNAME]")
{
FileInfo shp = new FileInfo(shpfile);
if (!shp.Exists) return false;
if (table == "[SHPNAME]") table = Path.GetFileNameWithoutExtension(shpfile).ToLower();
string args = string.Format("{0} {1}.{2}", shpfile, schema, table);
Command cli = Cli.Wrap(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, #"tools\shp2pgsql.exe")).WithArguments(args);
ExecutionResult eo = await cli.ExecuteAsync();
string sql = eo.StandardOutput;
if (dropIfExists) sql = sql.Replace("CREATE TABLE", string.Format("DROP TABLE IF EXISTS \"{0}\".\"{1}\";\r\nCREATE TABLE", schema, table));
string constring = string.Format("Host={0};Username={1};Password={2};Database={3}", host, user, pwd, db);
using (NpgsqlConnection connection = new NpgsqlConnection(constring))
{
connection.Open();
new NpgsqlCommand(sql, connection).ExecuteNonQuery();
}
return true;
}
I was looking at NetTopologySuite which has type definitions compatible with Npgsql and PostGIS but its all still pre-release and couldn't be bothered working it out.