I am new to .NET Core. I have defined the connection string in appsettings.json like this:
"ConnectionStrings": {
"TestBD": "Server=localhost;Database=Test;Trusted_Connection=True;MultipleActiveResultSets=true"
}
I am not using Entity Framework. I need to connect to the database using this connection string from the Program.cs file.
Any help is really appreciated. Thanks
You refer the following sample code to use ADO.NET in Asp.net 6 program.cs:
//required using Microsoft.Data.SqlClient;
app.MapGet("/movies", () =>
{
var movies = new List<Movie>();
//to get the connection string
var _config = app.Services.GetRequiredService<IConfiguration>();
var connectionstring = _config.GetConnectionString("DefaultConnection");
//build the sqlconnection and execute the sql command
using (SqlConnection conn = new SqlConnection(connectionstring))
{
conn.Open();
string commandtext = "select MovieId, Title, Genre from Movie";
SqlCommand cmd = new SqlCommand(commandtext, conn);
var reader = cmd.ExecuteReader();
while (reader.Read())
{
var movie = new Movie()
{
MovieId = Convert.ToInt32(reader["MovieId"]),
Title = reader["Title"].ToString(),
Genre = reader["Genre"].ToString()
};
movies.Add(movie);
}
}
return movies;
});
The result like this:
I have this code should be working but this is throwing an exception Must declare variable scalar
public async Task<Job> GetJobByUd(Guid jobId)
{
var sql = "select * from dbo.Jobs where JobId = #jobId;";
using (DbConnection db = new SqlConnection(_connectionString))
{
var job = await db.QuerySingleOrDefaultAsync<Job>(sql, new {jobId});
return job;
}
}
Try like this, it should work.
public async Task<Job> GetJobByUd(Guid jobId)
{
var sql = "select * from dbo.Jobs where JobId = #jobId;";
using (DbConnection db = new SqlConnection(_connectionString))
{
var job = await db.QueryAsync<Job>(sql, new {jobId = jobId}).FirstOrDefault();
return job;
}
}
Trying to Export Datatable to Excel (1.000.000 Records) in Web API and Angular, Writing Streaming is throwing an Out of Memory Exception.
Tried Splitting Datatables with 100.000 records each and writing stream seperately. However when I try to concat the stream, Out Of Memory Exception occurs.
Is it ever possible to export 1.000.000 records in an excel sheet. I am able to export upto 175.000 records. But require 1.000.000. See Snippet Below.
[HttpPost]
public HttpResponseMessage DownloadExcel([FromBody]AuditRequest auditRequest)
{
HttpResponseMessage result = Request.CreateResponse(HttpStatusCode.OK);
var response = GetAuditForDownload(auditRequest);
MemoryStream streamFinal = new MemoryStream();
List<AuditRequest> auditListForBulk = new List<AuditRequest>();
foreach (AuditRequest req in response.Data)
{
req.FromDate = auditRequest.FromDate;
req.ToDate = auditRequest.ToDate;
}
DataTable table = ConvertToDataTable(response.Data);
List<DataTable> splittedtables = table.AsEnumerable()
.Select((row, index) => new { row, index })
.GroupBy(x => x.index / 100000) //integer division, the fractional part is truncated
.Select(g => g.Select(x => x.row).CopyToDataTable())
.ToList();
splittedtables.ForEach(delegate (DataTable SplitTable)
{
MemoryStream stream = new MemoryStream();
StreamWriter writer = new StreamWriter(stream);
writer.Write(ToCSV(SplitTable).ToString());
writer.Flush();
stream.Position = 0;
stream.CopyTo(streamFinal);
//byteArray = GetBytesFromDataSet(SplitTable);
//byteArrayFinal = byteArrayFinal.Concat(byteArray).ToArray();
});
result = new HttpResponseMessage(HttpStatusCode.OK) { Content = new ByteArrayContent(streamFinal.ToArray()) };
result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = "File.csv"
};
return result;
}
I have SSRS report with parameters under SQL Reporting service 2012 standard edition. I like to export to excel and send as an attachment in the email to different receipt and receipt comes from some SQL query that means it is dynamic.
Data-driven subscription can do this but I have SQL Server 2012 Standard edition which does not support data-driven subscription and I can not upgrade, so I am looking for any code which can do the similar job like a data-driven subscription.
I found this link which has the solution to my issue.
http://jaliyaudagedara.blogspot.com/2012/10/creating-data-driven-subscription.html
when I try this code under visual studio 2015 "Class Library" project by adding service reference "http://mylocalserver:81/reportserver/ReportService2010.asmx" I am getting an error on this line of code.
ReportingService2010SoapClient rs= new ReportingService2010SoapClient();
Additional information about the error: Could not find default endpoint element that references contract 'ReportService2010.ReportingService2010Soap' in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this contract could be found in the client element.
After spending enough time to make it work with "Class Library" project, I decided to do the code under web service project by adding the web service reference. with some trial and error finally, I got the working code here under web service project. below code works on my local machine which has Sql server 2012 enterprise edition but it gives me the same error saying "Data-driven subscriptions to reports" is not supported in this edition of Reporting Services" on my company server which has SQL server 2012 standard edition.
public void DoWork()
{
ReportingService2010 rs = new ReportingService2010();
rs.Credentials = CredentialCache.DefaultCredentials;
// rs.Url = "http://mylocalserver:81/reportserver/ReportService2010.asmx";
rs.Url = "http://companyserver/reportserver/ReportService2010.asmx";
var reportPath = "/CYTYC Reports/";
string report = $"{reportPath}AllContactCIPPointsReport";
string description = "Programmatic Data Driven Subscription \"Report Server Email\" ";
//set extension as Windows File Share
ExtensionSettings settings = new ExtensionSettings();
settings.Extension = "Report Server Email";
// Set the extension parameter values.
var extensionParams = new ParameterValueOrFieldReference[8];
// var to = new ParameterFieldReference { ParameterName = "TO", FieldAlias = "PARAMS" }; // Data-driven.
var to = new ParameterValue { Name = "TO", Value = "example#gmail.com" }; // Data-driven.
extensionParams[0] = to;
var replyTo = new ParameterValue { Name = "ReplyTo", Value = "example#gmail.com" };
extensionParams[1] = replyTo;
var includeReport = new ParameterValue { Name = "IncludeReport", Value = "False" };
extensionParams[2] = includeReport;
var renderFormat = new ParameterValue { Name = "RenderFormat", Value = "HTML4.0" };
extensionParams[3] = renderFormat;
var priority = new ParameterValue { Name = "Priority", Value = "NORMAL" };
extensionParams[4] = priority;
var subject = new ParameterValue { Name = "Subject", Value = "Subsribed Report" };
extensionParams[5] = subject;
var comment = new ParameterValue { Name = "Comment", Value = "Here is the link to your report." };
extensionParams[6] = comment;
var includeLink = new ParameterValue { Name = "IncludeLink", Value = "True" };
extensionParams[7] = includeLink;
settings.ParameterValues = extensionParams;
// Create the data source for the delivery query.
var delivery = new DataSource { Name = "" };
var dataSourceDefinition = new DataSourceDefinition
{
ConnectString = "Data Source=CYTYC-LIVE;Initial Catalog=yourdatabasename",
CredentialRetrieval = CredentialRetrievalEnum.Store,
Enabled = true,
EnabledSpecified = true,
Extension = "SQL",
ImpersonateUserSpecified = false,
UserName = "username",
Password = "password"
};
delivery.Item = dataSourceDefinition;
// Create the data set for the delivery query.
var dataSetDefinition = new DataSetDefinition
{
AccentSensitivitySpecified = false,
CaseSensitivitySpecified = false,
KanatypeSensitivitySpecified = false,
WidthSensitivitySpecified = false
};
var queryDefinition = new QueryDefinition
{
CommandText = #"Your select * from Query",
CommandType = "Text",
Timeout = 45,
TimeoutSpecified = true
};
dataSetDefinition.Query = queryDefinition;
var results = new DataSetDefinition();
var oServerInfoHeader = new ServerInfoHeader();
var oTrustedUserHeader = new TrustedUserHeader();
bool changed;
string[] paramNames;
try
{
results = rs.PrepareQuery(delivery, dataSetDefinition, out changed, out paramNames);//.PrepareQuery(oTrustedUserHeader, delivery, dataSetDefinition, out results, out changed,out paramNames);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
var dataRetrieval = new DataRetrievalPlan { DataSet = results, Item = dataSourceDefinition };
// Set the event type and match data for the delivery.
const string eventType = "TimedSubscription";
const string matchData = "<ScheduleDefinition><StartDateTime>2018-06-01T14:00:00-07:00</StartDateTime><WeeklyRecurrence><WeeksInterval>1</WeeksInterval><DaysOfWeek><Monday>True</Monday><Tuesday>True</Tuesday><Wednesday>True</Wednesday><Thursday>True</Thursday><Friday>True</Friday></DaysOfWeek></WeeklyRecurrence></ScheduleDefinition>";
//const string eventType = "SnapshotUpdated";
//const string matchData = null;
//// Set the report parameter values.
//var parameters = new ParameterValueOrFieldReference[1];
//// i am retrieving value EMAIL from database and I am passing that value as my report parameter value
//var reportparam = new ParameterFieldReference { ParameterName = "yourreportparametername", FieldAlias = "PARAMS" }; // Data-driven.
//parameters[0] = reportparam;
var parameters = new ParameterValue[1];
var reportparam = new ParameterValue {Name = "yourreportparametername", Value = "yourreportparametervalue"};
parameters[0] = reportparam;
string subscriptionId = "";
try
{
subscriptionId = rs.CreateDataDrivenSubscription(report, settings, dataRetrieval, description, eventType, matchData, parameters);
//(oTrustedUserHeader, report, settings, dataRetrieval,description, eventType, matchData, parameters,out subscriptionId);
}
catch (System.Web.Services.Protocols.SoapException ex)
{
Console.WriteLine(ex.Detail.InnerText.ToString(CultureInfo.InvariantCulture));
}
}
You don't say why you need the Data Driven subscriptions - a regular SSRS subscription can e-mail an Excel report with set or default parameters.
There aren't any third party tools that I know of that emulates the Data Driven subscriptions but there have been some users who have created their own.
If you just want to trigger a subscription based on criteria, you could just use an SSIS job to run the query to determine whether to send or not and trigger the subscription if so.
Something like Data Driven Subscriptions SSRS Standard Edition 2008
If you need something more complicated (like varying TO/CC recipients, changing parameter values...), you'll need to do a bit more programming. Here's a couple things to get started with the theory and code:
https://www.mssqltips.com/sqlservertip/4249/simulate-reporting-services-data-driven-subscriptions-on-unsupported-editions/
http://www.sqlservercentral.com/articles/Reporting+Services+(SSRS)/163119/
In MVC4 , i have following code in my view :
<script>
var things = [];
function fun () {
var Quran = {
"surah": things[1].surah,
"ayah": things[1].ayah,
"verse": things[1].verse
};
things.push(Quran);
for (var n = 0; n < length; n++) {
$.ajax({
contentType: 'application/json; charset=utf-8',
method: 'GET',
url: "Gateway/DB_Rola?action=1",
data: things[n],
success: function (Data) {
var mera_obj = Data.key;
document.getElementById("Param2").value = '(' + mera_obj.Response_Code + ' , ' + mera_obj.Response_Description + ')';
},
error: function () {
alert("ERROR: can't connect to Server this time");
return false; }
});
alert("done for "+(n+1));
} // loop ends
return false;
}; // function ends
and controller method is :
public ActionResult DB_Rola(thing things)
{
string connectionString = #"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\PROGRAM FILES (X86)\MICROSOFT SQL SERVER\MSSQL.1\MSSQL\DATA\PEACE_QURAN.MDF;Integrated Security=True";
System.Data.SqlClient.SqlConnection connection = new SqlConnection(connectionString);
int surah = things.surah;
int ayah =things.ayah;
String verse = things.verse;
// designing parametiric_query from the parameters
string query = "insert into Ayyat_Translation_Language_old_20131209 values(null,null,#Surah,#Verse)";
SqlCommand cmd = new SqlCommand(query, connection);
connection.Open();
//setting parameters for parametric query
SqlParameter Parm1 = new SqlParameter("Surah", surah);
SqlParameter Parm2 = new SqlParameter("Ayah", ayah);
SqlParameter Parm3 = new SqlParameter("Verse", verse);
//adding parameters
cmd.Parameters.Add(Parm1);
cmd.Parameters.Add(Parm2);
cmd.Parameters.Add(Parm3);
cmd.ExecuteNonQuery();
System.IO.StreamWriter file = new System.IO.StreamWriter(#"E:\Office_Work\Peace_Quran\Peace_Quran\Files\hisaab.txt", true);
file.WriteLine(" "+things.ayah);
file.Close();
connection.Close();
return View();
}
as mentioned above in code ,there is loop in my view page that passes single object at a time which is received in above controller method .it works for small amount of data but when i send bulk .i.e. 50+ records at once, some of records are not saved in my DB. i don't know what's wrong with my DB code. please help me figure it out.