In this example I use Npgsql in development version 3.1.0-alpha6.
I want to specify a PostgisGeometry object as a parameter in a query (NpgsqlDbType.Geometry)
and select the object again.
Queries with types like Point, MultiPoint, LineString, MultiLineString, Polygon and GeometryCollection will be returned correctly. A PostgisMultiPolygon object with only one polygon will be returned correctly too.
However, it does not work with a PostgisMultiPolygon with more than one polygon.
PostgisMultiPolygon geom1 = new PostgisMultiPolygon(new[]
{
new PostgisPolygon(new[]
{
new[]
{
new Coordinate2D(40, 40),
new Coordinate2D(20, 45),
new Coordinate2D(45, 30),
new Coordinate2D(40, 40)
}
})
}) {SRID = 4326};
PostgisMultiPolygon geom2 = new PostgisMultiPolygon(new[]
{
new PostgisPolygon(new[]
{
new[]
{
new Coordinate2D(40, 40),
new Coordinate2D(20, 45),
new Coordinate2D(45, 30),
new Coordinate2D(40, 40)
}
}),
new PostgisPolygon(new[]
{
new[]
{
new Coordinate2D(20, 35),
new Coordinate2D(10, 30),
new Coordinate2D(10, 10),
new Coordinate2D(30, 5),
new Coordinate2D(45, 20),
new Coordinate2D(20, 35)
}
})
}) {SRID = 4326};
using (NpgsqlConnection connection = CreateConnection())
{
NpgsqlCommand command = connection.CreateCommand();
command.Parameters.AddWithValue("p1", NpgsqlDbType.Geometry, geom1);
command.CommandText = "Select :p1";
command.ExecuteScalar();
}
using (NpgsqlConnection connection = CreateConnection())
{
NpgsqlCommand command = connection.CreateCommand();
command.Parameters.AddWithValue("p1", NpgsqlDbType.Geometry, geom2);
command.CommandText = "Select :p1";
command.ExecuteScalar(); //timeout occurs...
}
If increasing the CommandTimeout, the timeout occurs anyway.
Thanks in advance!
The fix for this bug has just been merged: https://github.com/npgsql/npgsql/pull/1025
Related
String.Join in efcore not support and I want to get list of string with separator like sql function String_Agg
I tried to create custom sql server function but i get this error:
The parameter 'columnPartArg' for the DbFunction 'QueryHelper.StringAgg(System.Collections.Generic.IEnumerable`1[[System.String, System.Private.CoreLib, Version=5.0.0.0, Culture=neutral, PublicKeyToken=]],System.String)' has an invalid type 'IEnumerable'. Ensure the parameter type can be mapped by the current provider.
This is my function and OnModelCreatingAddStringAgg for register it in my dbcontext
public static string StringAgg(IEnumerable<string> columnPartArg, [NotParameterized] string separator)
{
throw new NotSupportedException();
}
public static void OnModelCreatingAddStringAgg(ModelBuilder modelBuilder)
{
var StringAggFuction = typeof(QueryHelper).GetRuntimeMethod(nameof(QueryHelper.StringAgg), new[] { typeof(IEnumerable<string>), typeof(string) });
var stringTypeMapping = new StringTypeMapping("NVARCHAR(MAX)");
modelBuilder
.HasDbFunction(StringAggFuction)
.HasTranslation(args => new SqlFunctionExpression("STRING_AGG",
new[]
{
new SqlFragmentExpression((args.ToArray()[0] as SqlConstantExpression).Value.ToString()),
args.ToArray()[1]
}
, nullable: true, argumentsPropagateNullability: new[] { false, false }, StringAggFuction.ReturnType, stringTypeMapping));
}
and this code run above function
_context.PersonnelProjectTimeSheets.GroupBy(c => new { c.Date.Date, c.PersonnelId, c.Personnel.PersonnelCode, c.Personnel.FirstName, c.Personnel.LastName})
.Select(c => new PersonnelProjectTimeOutputViewModel
{
IsConfirmed = c.Min(c => (int)(object)(c.IsConfirmed ?? false)) == 1,
PersonnelDisplay = c.Key.PersonnelCode + " - " + c.Key.FirstName + " " + c.Key.LastName,
PersonnelId = c.Key.PersonnelId,
Date = c.Key.Date,
ProjectName = QueryHelper.StringAgg(c.Select(x=>x.Project.Name), ", "),
TotalWorkTime = 0,
WorkTimeInMinutes = c.Sum(c => c.WorkTimeInMinutes),
});
And also i change my StringAgg method input to
string columnPartArg
and change SqlFunctionExpression of OnModelCreatingAddStringAgg to
new[]
{
new SqlFragmentExpression((args.ToArray()[0] as
SqlConstantExpression).Value.ToString()),
args.ToArray()[1]
}
and change my query code to
ProjectName = QueryHelper.StringAgg("Project.Name", ", ")
now when run my query, sql server could not recognize the Project
i guess the parameter 'columnPartArg' of dbfunction 'STRING_AGG' is varchar or nvarchar. right?
most database function or procedure has not table value as parameter.
in this case,use EFCore's 'client evaluation' is good sulution. linq like below：
_context.PersonnelProjectTimeSheets.GroupBy(c => new { c.Date.Date, c.PersonnelId, c.Personnel.PersonnelCode, c.Personnel.FirstName, c.Personnel.LastName})
.Select(c => new PersonnelProjectTimeOutputViewModel
{
IsConfirmed = c.Min(c => (int)(object)(c.IsConfirmed ?? false)) == 1,
PersonnelDisplay = c.Key.PersonnelCode + " - " + c.Key.FirstName + " " + c.Key.LastName,
PersonnelId = c.Key.PersonnelId,
Date = c.Key.Date,
ProjectName = string.Join(", ",c.Select(x=>x.Project.Name)),//Client evaluation
TotalWorkTime = 0,
WorkTimeInMinutes = c.Sum(c => c.WorkTimeInMinutes),
});
I am trying to post my inputs to my SQL Server database. I can in fact POST to the database, but I get back a blank response. I know it's because I am returning "Success" instead of my variables but how to I correctly format that for the return statement?
POST method:
[HttpPost]
public JsonResult Post(Weather Wea)
{
string query = #"INSERT INTO dbo.Information (Date, TemperatureC, TemperatureF, Summary) VALUES ('" + Wea.Date + #"'
,'" + Wea.TemperatureC + #"'
,'" + Wea.TemperatureF + #"'
,'" + Wea.Summary + #"'
)";
DataTable table = new DataTable();
string sqlDataSource = _configuration.GetConnectionString("WeatherAppCon");
SqlDataReader myReader;
using (SqlConnection myCon = new SqlConnection(sqlDataSource))
{
myCon.Open();
using (SqlCommand myCommand = new SqlCommand(query, myCon))
{
myReader = myCommand.ExecuteReader();
table.Load(myReader);
myReader.Close();
myCon.Close();
}
}
return new JsonResult("Success");
}
Front-end POST
export class PostDataComponent {
baseUrl: string;
date: number;
temperatureC: number;
summary: string;
weatherForm: FormGroup;
constructor(public http: HttpClient, #Inject('BASE_URL') baseUrl: string, private formBuilder: FormBuilder) {
this.baseUrl = "https://localhost:44347/WeatherForecast";
this.weatherForm = formBuilder.group({
Date: new FormControl(),
TemperatureC: new FormControl(),
Summary: new FormControl()
});
}
CreateData() {
const params = new HttpParams({
fromObject: {
'date': this.weatherForm.value.Date.toString(),
'temperatureC': this.weatherForm.value.TemperatureC.toString(),
'summary': this.weatherForm.value.Summary.toString()
}
});
console.log(params);
this.http.post(this.baseUrl, {},{ params: params }).subscribe(data => {
console.log(data);
});
}
}
Couple things here.
As marc_s commented, you should be using parameterization instead of concatenating to avoid any potential SQL injection:
string query = #"INSERT INTO dbo.Information (Date, TemperatureC, TemperatureF, Summary) VALUES (#Date, #TemperatureC, #TemperatureF, #Summary)";
...
using (System.Data.SqlClient.SqlCommand myCommand = new SqlCommand(query, myCon))
{
myCommand.Parameters.AddWithValue("#Date", Wea.Date);
myCommand.Parameters.AddWithValue("#TemperatureC", Wea.TemperatureC);
myCommand.Parameters.AddWithValue("#TemperatureF", Wea.TemperatureF);
myCommand.Parameters.AddWithValue("#Summary", Wea.Summary);
...
Unless you have a trigger on your target table with an output, your query isn't returning any data (just the number of rows inserted) and your SqlDataReader is empty. You could get rid of the reader/DataTable and use myCommand.ExecuteScalar() instead in this case. If you do have a trigger outputting the inserted data, disregard this.
If you don't have an output trigger but do still need to return the inserted values for whatever reason, you could keep your SqlDataReader and update your query to the following
string query = #"INSERT INTO dbo.Information (Date, TemperatureC, TemperatureF, Summary)
OUTPUT inserted.Date,inserted.TemperatureC,inserted.TemperatureF,inserted.Summary
VALUES (#Date, #TemperatureC, #TempreatureF, #Summary)";
Without knowing the response format you're looking for, it's hard to give an answer on how to generate it. If you need to return the inserted values, you could use the OUTPUT keyword as in the previous bullet and serialize your DataTable.
I want to put an image overlay over video, but I'm not sure how I can do this. I'm trying to modify example from this repo Azure Media Services v3 .NET Core tutorials
, bascially what I changed here is transform:
private static Transform EnsureTransformForOverlayExists(IAzureMediaServicesClient client, string resourceGroupName, string accountName, string transformNameNew)
{
Console.WriteLine(transformNameNew);
Transform transform = client.Transforms.Get(resourceGroupName, accountName, transformName);
if (transform == null)
{
TransformOutput[] outputs = new TransformOutput[]
{
new TransformOutput(
new StandardEncoderPreset(
codecs: new Codec[]
{
new AacAudio(
channels: 2,
samplingRate: 48000,
bitrate: 128000,
profile: AacAudioProfile.AacLc
),
new H264Video(stretchMode: "AutoFit",
keyFrameInterval: TimeSpan.FromSeconds(2),
layers: new[]
{
new H264Layer(
bitrate: 1500000,
maxBitrate: 1500000,
width: "640",
height: "360"
)
}
),
new PngImage(
start: "25%",
step: "25%",
range: "80%",
layers: new PngLayer[]{
new PngLayer(
width: "50%",
height: "50%"
)
}
),
},
filters: new Filters
{
Overlays = new List<Overlay>
{
new VideoOverlay("input1")
}
},
formats: new Format[]
{
new Mp4Format(
filenamePattern: "{Basename}_letterbox{Extension}"
),
new PngFormat(
filenamePattern: "{Basename}_{Index}_{Label}_{Extension}"
),
}
))
};
transform = client.Transforms.CreateOrUpdate(resourceGroupName, accountName, transformName, outputs);
}
return transform;
}
and RunAsync method to provide multiple inputs where one of them should be an overlay:
private static async Task RunAsync(ConfigWrapper config)
{
IAzureMediaServicesClient client = await CreateMediaServicesClientAsync(config);
// Set the polling interval for long running operations to 2 seconds.
// The default value is 30 seconds for the .NET client SDK
client.LongRunningOperationRetryTimeout = 2;
try
{
// Ensure that you have customized encoding Transform. This is really a one time setup operation.
Transform overlayTransform = EnsureTransformForOverlayExists(client, config.ResourceGroup, config.AccountName, transformName);
// Creating a unique suffix so that we don't have name collisions if you run the sample
// multiple times without cleaning up.
string uniqueness = Guid.NewGuid().ToString().Substring(0, 13);
string jobName = "job-" + uniqueness;
string inputAssetName = "input-" + uniqueness;
string outputAssetName = "output-" + uniqueness;
Asset asset = client.Assets.CreateOrUpdate(config.ResourceGroup, config.AccountName, inputAssetName, new Asset());
var inputs = new JobInputs(new List<JobInput>());
var input = new JobInputHttp(
baseUri: "https://nimbuscdn-nimbuspm.streaming.mediaservices.windows.net/2b533311-b215-4409-80af-529c3e853622/",
files: new List<String> {"Ignite-short.mp4"},
label:"input1"
);
inputs.Inputs.Add((input));
input = new JobInputHttp(
baseUri: "SomeBaseUriHere",
files: new List<string> {"AssetVideo_000001_None_.png"},
label: "overlay");
inputs.Inputs.Add((input));
Asset outputAsset = CreateOutputAsset(client, config.ResourceGroup, config.AccountName, outputAssetName);
Job job = SubmitJob(client, config.ResourceGroup, config.AccountName, transformName, jobName, inputs, outputAsset.Name);
DateTime startedTime = DateTime.Now;
job = WaitForJobToFinish(client, config.ResourceGroup, config.AccountName, transformName, jobName);
TimeSpan elapsed = DateTime.Now - startedTime;
if (job.State == JobState.Finished)
{
Console.WriteLine("Job finished.");
if (!Directory.Exists(outputFolder))
Directory.CreateDirectory(outputFolder);
await MakeContainerPublic(client, config.ResourceGroup, config.AccountName, outputAsset.Name, config.BlobConnectionString);
DownloadResults(client, config.ResourceGroup, config.AccountName, outputAsset.Name, outputFolder).Wait();
}
else if (job.State == JobState.Error)
{
Console.WriteLine($"ERROR: Job finished with error message: {job.Outputs[0].Error.Message}");
Console.WriteLine($"ERROR: error details: {job.Outputs[0].Error.Details[0].Message}");
}
}
catch(ApiErrorException ex)
{
string code = ex.Body.Error.Code;
string message = ex.Body.Error.Message;
Console.WriteLine("ERROR:API call failed with error code: {0} and message: {1}", code, message);
}
}
But I have this error
Microsoft.Cloud.Media.Encoding.PresetException: Preset ERROR: There are 2 input assets. Preset has 2 Source but does NOT specify AssetID for each Source
and I have no idea how to overcome this.
At this time, it is not possible to use v3 APIs to create overlays. The feature is not fully implemented. See this link for other gaps between the v2 and v3 APIs.
For more details, you can see this site .
I want to create a method to get names of all sheets in a workbook. My workbook has 7 sheets. If I want to read and save names of sheets to the variable excelSheets, I receive 9 names, where two names response to non-exists sheets ("lists$" and "TYPAB").
I don't understand where is the problem? How can I get names only the existing sheets?
public List<string> NamesOfSheets(string filename)
{
string con = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filename + ";Extended Properties='Excel 12.0;HDR=Yes;'";
using (OleDbConnection connection = new OleDbConnection(con))
{
connection.Open();
List<string> excelSheets;
try
{
DataTable dt = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
excelSheets = dt.Rows.Cast<DataRow>()
.Select(i => i["TABLE_NAME"].ToString()).ToList();
return excelSheets;
}
catch (Exception)
{
throw new Exception("Failed to get SheetName");
}
}
}
Oscar, thanks for your help, but office interlop doesn't solve my problem.
I found that "lists$" is hidden sheet, so only name TYPAB doesn't respond to any existing sheet.
So I added clause where and problem is solved. :)
public List<string> NamesOfSheets(string filename)
{
string con = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filename + ";Extended Properties='Excel 12.0;HDR=Yes;'";
List<string> excelSheets;
using (OleDbConnection connection = new OleDbConnection(con))
{
connection.Open();
try
{
DataTable dt = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
excelSheets = dt.Rows.Cast<DataRow>()
.Where(i => i["TABLE_NAME"].ToString().EndsWith("$") || i["TABLE_NAME"].ToString().EndsWith("$'"))
.Select(i => i["TABLE_NAME"].ToString()).ToList();
return excelSheets;
}
catch (Exception)
{
throw new Exception("Failed to get SheetName");
}
}
}
Why not use Office Interop for this?
foreach (Excel.Worksheet displayWorksheet in Globals.ThisWorkbook.Worksheets)
{
Debug.WriteLine(displayWorksheet.Name);
}
https://msdn.microsoft.com/en-us/library/59dhz064.aspx
I have a new problem.
I already done my widget but now i want 5 rating widget's for 5 categories in my database.
I have this column in my database (named places.categ):
places.categ
a
b
c
d
a
e
....
I have 21 markers in my Google Maps and each one of them as a category. (a,b,c,d or e).
How can i associate 5 rating widgets to those 21 markers by category? All i could do was this:
db.define_table('product',
Field('A', 'integer',requires=IS_IN_SET(range(1,6))),
Field('B', 'integer',requires=IS_IN_SET(range(1,6))),
Field('C', 'integer',requires=IS_IN_SET(range(1,6))),
Field('D', 'integer',requires=IS_IN_SET(range(1,6))),
Field('E', 'integer',requires=IS_IN_SET(range(1,6))))
I have this code in my models/db.py and this one in my controllers/default.py:
from plugin_rating_widget import RatingWidget
# Inject the widgets
db.product.A.widget = RatingWidget()
db.product.B.widget = RatingWidget()
db.product.C.widget = RatingWidget()
db.product.D.widget = RatingWidget()
db.product.E.widget = RatingWidget()
# form2 = SQLFORM.factory(
# Field('Rating','integer',widget=SQLFORM.widgets.RatingWidget))
# if form2.process().accepted:
# print form2.vars.search
form2 = SQLFORM(db.product)
if form2.accepts(request.vars, session):
session.flash = 'submitted %s' % form2.vars
redirect(URL('index'))
I have 5 rating widget but they are not associated to my database and they are vertical (in 5 lines) and not in 1 line, like i wanted too.
TIA.
P.S.: I have the plugin rating widget uploaded.
I solved in another way. I get colors to each category with this code:
var amarelo = new google.maps.MarkerImage(
"http://labs.google.com/ridefinder/images/mm_20_yellow.png",
new google.maps.Size(12, 20),
new google.maps.Point(0, 0),
new google.maps.Point(6, 20));
var vermelho = new google.maps.MarkerImage(
"http://labs.google.com/ridefinder/images/mm_20_red.png",
new google.maps.Size(12, 20),
new google.maps.Point(0, 0),
new google.maps.Point(6, 20));
var verde = new google.maps.MarkerImage(
"http://labs.google.com/ridefinder/images/mm_20_green.png",
new google.maps.Size(12, 20),
new google.maps.Point(0, 0),
new google.maps.Point(6, 20));
var azul = new google.maps.MarkerImage(
"http://labs.google.com/ridefinder/images/mm_20_blue.png",
new google.maps.Size(12, 20),
new google.maps.Point(0, 0),
new google.maps.Point(6, 20));
var branco = new google.maps.MarkerImage(
"http://labs.google.com/ridefinder/images/mm_20_white.png",
new google.maps.Size(12, 20),
new google.maps.Point(0, 0),
new google.maps.Point(6, 20));
var sombra = new google.maps.MarkerImage(
"http://labs.google.com/ridefinder/images/mm_20_shadow.png",
new google.maps.Size(22, 20),
new google.maps.Point(0, 0),
new google.maps.Point(6, 20));
I awarded each category in one of this colors (example):
if (placescoordjs[i][4]== 'a')
{
marker = new google.maps.Marker({
position: new google.maps.LatLng(placescoordjs[i][1],placescoordjs[i][2]),
icon: amarelo, shadow: sombra,
map: map,
title: placescoordjs[i][3]
});
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowindow.setContent(placescoordjs[i][0]);
infowindow.open(map, marker);
}
})(marker, i));
}
I have more 3 "else if" and the final else with the final color to my last category.
Thanks anyway. ;)