public static string[] GetCities(string prefixText, int count, string state)
{
PostalInfoLookupDataSet ds = PostalInfoLookupDataSet.Instance;
string cityFilter = string.Format(CultureInfo.CurrentCulture,
@"(State = '{0}' OR '{0}' = '')
AND City LIKE '{1}%'"
, state, prefixText);
DataView dw = new DataView(ds.Zip);
dw.RowFilter = cityFilter;
dw.Sort = "City";
List <string> resultCities = new List <string>();
string previousCity = null;
int remainingValues = count;
foreach (DataRowView rowView in dw)
{
PostalInfoLookupDataSet.ZipRow zipRow = (PostalInfoLookupDataSet.ZipRow)rowView.Row;
//The following is to remove duplicate cities, because there is no select DISTINCT clause on in-memory datasets.
if (zipRow.City != previousCity)
{
previousCity = zipRow.City;
resultCities.Add(zipRow.City);
remainingValues--;
if (remainingValues == 0)
{
break;
}
}
}
return(resultCities.ToArray());
}
public IEnumerable <string> GetCities(string prefix, string state, int maxResults)
{
string query = string.Format(
@"(State = '{0}' OR '{0}' = '')
AND City LIKE '{1}%'",
InputValidator.EncodeQueryStringParameter(state),
InputValidator.EncodeQueryStringParameter(prefix));
DataView view = new DataView(_data.Zip);
view.RowFilter = query;
view.Sort = "City";
string previousCity = null;
int rowsRemaining = maxResults;
foreach (DataRowView viewRow in view)
{
PostalInfoLookupDataSet.ZipRow row = (PostalInfoLookupDataSet.ZipRow)viewRow.Row;
//The following is to remove duplicate cities, because there is no select DISTINCT clause on in-memory datasets.
if (row.City != previousCity)
{
previousCity = row.City;
yield return(row.City);
if (--rowsRemaining == 0)
{
yield break;
}
}
}
}
public static string[] GetZipCodes(string prefixText, int count, string state, string city)
{
PostalInfoLookupDataSet ds = PostalInfoLookupDataSet.Instance;
string zipCodeFilter = string.Format(CultureInfo.CurrentCulture,
@"(State = '{0}' OR '{0}' = '')
AND (City = '{1}' OR '{1}' = '')
AND ZipCode LIKE '{2}%'"
, state, city, prefixText);
DataView dw = new DataView(ds.Zip);
dw.RowFilter = zipCodeFilter;
dw.Sort = "ZipCode";
List <string> resultZipCodes = new List <string>();
int remainingValues = count;
foreach (DataRowView rowView in dw)
{
PostalInfoLookupDataSet.ZipRow zipRow = (PostalInfoLookupDataSet.ZipRow)rowView.Row;
resultZipCodes.Add(zipRow.ZipCode);
remainingValues--;
if (remainingValues == 0)
{
break;
}
}
return(resultZipCodes.ToArray());
}
public IEnumerable <ZipCode> GetZipCodes(string prefix, string city, string state, int maxResults)
{
string query = string.Format(@"(State = '{0}' OR '{0}' = '')
AND (City = '{1}' OR '{1}' = '')
AND ZipCode LIKE '{2}%'" ,
InputValidator.EncodeQueryStringParameter(state),
InputValidator.EncodeQueryStringParameter(city),
InputValidator.EncodeQueryStringParameter(prefix));
DataView view = new DataView(_data.Zip);
view.RowFilter = query;
for (int i = 0; i < view.Count && i < maxResults; ++i)
{
PostalInfoLookupDataSet.ZipRow row =
(PostalInfoLookupDataSet.ZipRow)(view[i].Row);
yield return(_data.ZipRowToZipCode(row));
}
}