I am currently working on a project to insert a list of records from a dynamics 365 website into to a SQL Server database. However when I call the class file no insert is currently made into the database.
Can someone assist me? I have placed an ellipsis at the where the code which pulls the data from crm would be as that code works fine and so what you're reading isn't as long. Let me know if it is needed.
public class ProgramPVT
{
static void Main (string[] args)
{
try
{
...
int count = 0;
int n = count;
foreach (var item in performancevt)
{
performancevt.Add(item);
}
var totalnumber = performancevt.Count;
var t = totalnumber;
var accountmanager = new string[t];
var monthlytarget = new string[t];
var forecast_ = new string[t];
var actual_ = new string[t];
var managedservices = new string[t];
var pvtpercentage_ = new string[t];
var mspercentage_ = new string[t];
SqlConnection crmdbconnection = new SqlConnection("Data Source =*****;Initial Catalog=****;User Id = ******;Password = ******;");
crmdbconnection.Open();
foreach (var performanceitem in performancevt)
{
accountmanager[n] = performanceitem.accountmanager.ToString();
monthlytarget[n] = performanceitem.monthlytarget.ToString();
forecast_[n] = performanceitem.accountmanager.ToString();
actual_[n] = performanceitem.accountmanager.ToString();
managedservices[n] = performanceitem.monthlytarget.ToString();
pvtpercentage_[n] = performanceitem.accountmanager.ToString();
mspercentage_[n] = performanceitem.accountmanager.ToString();
var i = 0;
do
{
try
{
string cmdtext = "INSERT INTO PerformanceVTarget (Account_Manager, Month_Target, Forecast, Achieved, Total_Percentage, MS_Percentage) VALUES (#Account_Manager, #Month_Target, #Forecast, #Achieved, #Total_Percentage, #MS_Percentage)";
using (var cmd = new SqlCommand(cmdtext, crmdbconnection))
{
{
cmd.Parameters.AddWithValue("#Account_Manager", accountmanager[n]);
cmd.Parameters.AddWithValue("#Month_Target", accountmanager[n]);
cmd.Parameters.AddWithValue("#Forecast", accountmanager[n]);
cmd.Parameters.AddWithValue("#Achieved", accountmanager[n]);
cmd.Parameters.AddWithValue("#Total_Percentage", accountmanager[n]);
cmd.Parameters.AddWithValue("#Account_Manager", accountmanager[n]);
}
cmd.ExecuteNonQuery();
}
}
catch (Exception fx)
{
Console.Write(fx);
Console.WriteLine("Line with ID:", n, " not inserted");
Console.WriteLine("Error - Press enter to Continue");
Console.ReadLine();
}
i++;
} while (i < t);
}
n = n + 1;
}
catch (Exception ex)
{
Console.Write(ex);
Console.WriteLine("Press Enter to Continue");
Console.ReadLine();
}
}
}
}
Table PerformanceVTarget
[ID] pk, int ,not null
[Report_ID] int, null
[Account_Manager] varchar(50) not null
[Month_Target] varchar(50) not null
[Forecast] varchar(50) not null
[Achieved] varchar(50) not null
[Total_Percentage] varchar(50) not null
[MS_Percentage] varchar(50) not null
[Team] varchar(50) null
Your code execution will never come out of this loop.
foreach (var item in performancevt)
{
performancevt.Add(item);
}
This is a deadlock or you should get an error.
Also you are not passing any value to [MS_Percentage] & Id (primary key field), both are non-null columns.
Related
I have looked into all the questions on the "database is locked" exception but none solve my problem. I have a static function in DBActions class that inserts a record in DB as follows:
public static class DBActions
{
// save col, value pairs in DB table
public static int SaveInDB(string table, string[] cols, object[] vals)
{
int resultID = 0;
string query = $"insert into {table} (";
for (int i = 0; i < cols.Length - 1; i++)
{ // leave the last column coz comma does not follow it
query += cols[i] + ", ";
}
query += cols[cols.Length - 1] + ") values (";
for (int i = 0; i < cols.Length - 1; i++)
{
query += $"'{vals[i]}', ";
}
query += $"'{vals[vals.Length - 1]}')";
//MessageBox.Show(query);
using (SQLiteConnection con = new SQLiteConnection(Global.ConnectionString))
{
using (SQLiteCommand cmd = new SQLiteCommand(con))
{
try
{
con.Open();
using (SQLiteTransaction trans = con.BeginTransaction())
{
cmd.CommandText = query;
cmd.ExecuteNonQuery();
resultID = (int)con.LastInsertRowId;
trans.Commit(); // raises the exception
}
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
finally
{
con.Close();
cmd.Dispose();
}
}
}
return resultID;
}
}
and I am calling this static function whenever I need to save some record in any table like this:
Global.StartTime = GetCurrentTimeStamp();
string[] cols = { "SampleID", "OperatorID", "StartTimeStamp"};
object[] vals = { SampleID, CurrentUser, Global.StartTime};
Global.ExpID = DBActions.SaveInDB("ExperimentSettings", cols, vals);
When I call it the very first time, it throws the "database is locked" exception. For all others, it executes fine. What could be the possible cause of this? I think all my DB objects are properly being disposed off due to the using statements.
Here my insert code of SQLLite Database in Windows 8 and I want to update the records which are added in database
private async void insert(object sender, RoutedEventArgs e) {
if (txt1.Text != "" && txt2.Text != "" && txt3.Text != "") {
var dbpath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "data.db3");
using (var db = new SQLite.SQLiteConnection(dbpath)) {
// Create the tables if they don't exist
db.Insert(new person() {
id= Guid.NewGuid(),
name = txt1.Text.ToString(),
address = txt2.Text.ToString(),
phone = Convert.ToDouble(txt3.Text.ToString()),
});
db.Commit();
db.Dispose();
db.Close();
}
} else {
throw new NullReferenceException("Enter The Data In Textboxes");
}
}
In SQLite there's Get<T> method which accept primary key as argument and it will return the row as object. Update method accept the object as parameter and it will update the existing record. Here I am giving you method to update person record.
private void UpdateRecord(int primaryKey)
{
var dbpath = System.IO.Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "data.db3");
using (var db = new SQLite.SQLiteConnection(dbpath))
{
var objPerson = db.Get<person>(primaryKey);
objPerson.name = "New name";
objPerson.address = "New address ";
objPerson.phone = Convert.ToDouble("New phone number");
db.Update(objPerson);
//You don't need to use db.Commit(), db.Dispose() & db.Close() because you are using "using" keyword.
}
}
I have a class which creates a session the following way:
Session["UserId"] = UserId; // UserId = 1
In one of the pages on Page_Load, I retrieve the session variable value this way which works fine:
if (Session["UserId"] != null){
var userid = Session["UserId"];
Welcome.Text = "Hello, " + userid;
}
Now I need to use the value of the session variable in my classes as well. I used the following method to get the session value int useridsession = Convert.ToInt32(HttpContext.Current.Session["UserId"]); but it always returns null whereas the session is correctly read using Session["UserId"]; in my code behind file.
The mentioned class:
public static DataTable ManageBookingsDataTable()
{
int useridsession = Convert.ToInt32(HttpContext.Current.Session["UserId"]);
SqlConnection con = new SqlConnection(Database.ConnectionString);
con.Open();
SqlCommand cmd = new SqlCommand("select bookings.id,user_id, start_date, end_date, pets.name AS 'Pet name' from bookings AS bookings left join users AS usr ON bookings.user_id=usr.id AND bookings.user_id=1 left join pets AS pets ON pets.id=bookings.pet_id WHERE bookings.user_id=#userid_session", con);
cmd.Parameters.AddWithValue("#userid_session", useridsession);
SqlDataAdapter sqlDa = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
string id = string.Empty;
string name = string.Empty;
string startdate = string.Empty;
string enddate = string.Empty;
string full_string = string.Empty;
sqlDa.Fill(dt);
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
id = dt.Rows[i]["id"].ToString();
var sdate = dt.Rows[i]["start_date"];
name = dt.Rows[i]["Pet name"].ToString();
startdate = dt.Rows[i]["start_date"].ToString();
enddate = dt.Rows[i]["end_date"].ToString();
full_string = startdate + " to " + enddate + " (" + name + ")";
//CurrentBookings.Items.Add(new ListItem(full_string, id));
}
}
return dt;
}
I diagnosed the problem by adding HttpContext.Current.Session["UserId"] = 1; which proves that when I set the session in the same class, the method works.
My question is how do I access the previously created session from any class?
Session should be available for the session regardless of the class. Why don't you set and get
your session values using the same class? All your session stuff in a one place so it is more neat and tidy as well.
Local.MySession.UserId = UserId; //Set here
int myUserId = Local.MySession.UserId; //Get here
//Something like this??
namespace Local
{
//You can add all session variables to this class
public class MySession
{
public static int UserId
{
get
{
return Convert.ToInt32(HttpContext.Current.Session["userId"] ?? "0");
}
set { HttpContext.Current.Session["userId"] = value.ToString(); }
}
public static string UserEmail //For Example another session variable
{
get { return HttpContext.Current.Session["email"] ?? ""; }
set { HttpContext.Current.Session["email"] = value; }
}
}
}
I'm trying to transfer the data from SQLite to SQL Server. The schema of target and destination table are just the same:
SQL Server:
CREATE TABLE [dbo].[Shop] (
[ShopID] [int] IDENTITY(1,1) NOT NULL,
[Name] [nvarchar](128) NOT NULL,
[Url] [nvarchar](128) NOT NULL,
PRIMARY KEY CLUSTERED
(
[ShopID] ASC
))
and SQLite:
CREATE TABLE "Shop" (
"ShopID" INTEGER PRIMARY KEY NOT NULL,
"Name" VARCHAR NOT NULL,
"Url" VARCHAR NOT NULL);
I wrote the code as below (with System.Data.SQLite):
using (var conn = new SQLiteConnection(#"Data Source=Data.sqlite;FailIfMissing=True"))
{
conn.Open();
var cmd = new SQLiteCommand("SELECT * FROM Shop", conn);
var reader = cmd.ExecuteReader();
using (var bulkCopy = new SqlBulkCopy("Data Source=.;Initial Catalog=Test;Integrated Security=True"))
{
bulkCopy.DestinationTableName = "Shop";
bulkCopy.ColumnMappings.Add("ShopID", "ShopID");
bulkCopy.ColumnMappings.Add("Name", "Name");
bulkCopy.ColumnMappings.Add("Url", "Url");
bulkCopy.WriteToServer(reader);
}
}
Data has been loaded by reader (I've checked). But an InvalidOperationException throws on WriteToServer method: The given ColumnMapping does not match up with any column in the source or destination.
Any ideas or suggestion for me?
This may or may not solve your problem, but you probably want to use the SqlBulkCopyOptions to specify that you don't want it to generate new identity values.
SqlBulkCopy bulkCopy = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.KeepIdentity))
This works for me...
private void GatherDb3Info(FileInfo[] fiDb3) {
SQLiteConnectionStringBuilder csb = new SQLiteConnectionStringBuilder();
foreach (FileInfo fi in fiDb3) {
csb.Clear();
csb.DataSource = fi.FullName;
csb.Password = "P#$$w0rd";
csb.SyncMode = SynchronizationModes.Full;
using (var conn = new SQLiteConnection(csb.ToString())) {
conn.Open();
DataTable dtTables = conn.GetSchema(SQLiteMetaDataCollectionNames.Tables, new String[] { });
foreach (DataRow dRow in dtTables.Rows) {
if (dRow["Table_Type"].ToString().ToLower() != "table") continue;
String
catName = String.Format("{0}", dRow["Table_Catalog"]),
schName = String.Format("{0}", dRow["Table_Schema"]),
tblName = String.Format("{0}", dRow["Table_Name"]);
DataTable dtColumns = conn.GetSchema(SQLiteMetaDataCollectionNames.Columns, new System.String[] { catName, schName, tblName });
StringBuilder sb = new StringBuilder();
foreach (DataRow dRowColumn in dtColumns.Rows) {
sb.AppendFormat("[{0}], ", dRowColumn["Column_Name"]);
}
String sColList = sb.ToString();
sColList = sColList.Remove(sColList.Length - 2);
var cmd = new SQLiteCommand("Select " + sColList + " From " + tblName, conn);
var reader = cmd.ExecuteReader();
using (var bulkCopy = new System.Data.SqlClient.SqlBulkCopy(#"Server=.;Integrated Security=true;Database=TargetDBName;")) {
bulkCopy.DestinationTableName = "TargetTableSchema." + tblName;
try {
bulkCopy.WriteToServer(reader);
} catch (Exception) { }
}
}
conn.Close();
}
}
}
I have used sqlite in c++, python and now (perhaps) in C#. In all of these I have no idea how to insert a blob into a table. How do I store and retrieve a blob in sqlite?
Here's how you can do it in C#:
class Program
{
static void Main(string[] args)
{
if (File.Exists("test.db3"))
{
File.Delete("test.db3");
}
using (var connection = new SQLiteConnection("Data Source=test.db3;Version=3"))
using (var command = new SQLiteCommand("CREATE TABLE PHOTOS(ID INTEGER PRIMARY KEY AUTOINCREMENT, PHOTO BLOB)", connection))
{
connection.Open();
command.ExecuteNonQuery();
byte[] photo = new byte[] { 1, 2, 3, 4, 5 };
command.CommandText = "INSERT INTO PHOTOS (PHOTO) VALUES (#photo)";
command.Parameters.Add("#photo", DbType.Binary, 20).Value = photo;
command.ExecuteNonQuery();
command.CommandText = "SELECT PHOTO FROM PHOTOS WHERE ID = 1";
using (var reader = command.ExecuteReader())
{
while (reader.Read())
{
byte[] buffer = GetBytes(reader);
}
}
}
}
static byte[] GetBytes(SQLiteDataReader reader)
{
const int CHUNK_SIZE = 2 * 1024;
byte[] buffer = new byte[CHUNK_SIZE];
long bytesRead;
long fieldOffset = 0;
using (MemoryStream stream = new MemoryStream())
{
while ((bytesRead = reader.GetBytes(0, fieldOffset, buffer, 0, buffer.Length)) > 0)
{
stream.Write(buffer, 0, (int)bytesRead);
fieldOffset += bytesRead;
}
return stream.ToArray();
}
}
}
This worked fine for me (C#):
byte[] iconBytes = null;
using (var dbConnection = new SQLiteConnection(DataSource))
{
dbConnection.Open();
using (var transaction = dbConnection.BeginTransaction())
{
using (var command = new SQLiteCommand(dbConnection))
{
command.CommandText = "SELECT icon FROM my_table";
using (var reader = command.ExecuteReader())
{
while (reader.Read())
{
if (reader["icon"] != null && !Convert.IsDBNull(reader["icon"]))
{
iconBytes = (byte[]) reader["icon"];
}
}
}
}
transaction.Commit();
}
}
No need for chunking. Just cast to a byte array.
I ended up with this method for inserting a blob:
protected Boolean updateByteArrayInTable(String table, String value, byte[] byteArray, String expr)
{
try
{
SQLiteCommand mycommand = new SQLiteCommand(connection);
mycommand.CommandText = "update " + table + " set " + value + "=#image" + " where " + expr;
SQLiteParameter parameter = new SQLiteParameter("#image", System.Data.DbType.Binary);
parameter.Value = byteArray;
mycommand.Parameters.Add(parameter);
int rowsUpdated = mycommand.ExecuteNonQuery();
return (rowsUpdated>0);
}
catch (Exception)
{
return false;
}
}
For reading it back the code is:
protected DataTable executeQuery(String command)
{
DataTable dt = new DataTable();
try
{
SQLiteCommand mycommand = new SQLiteCommand(connection);
mycommand.CommandText = command;
SQLiteDataReader reader = mycommand.ExecuteReader();
dt.Load(reader);
reader.Close();
return dt;
}
catch (Exception)
{
return null;
}
}
protected DataTable getAllWhere(String table, String sort, String expr)
{
String cmd = "select * from " + table;
if (sort != null)
cmd += " order by " + sort;
if (expr != null)
cmd += " where " + expr;
DataTable dt = executeQuery(cmd);
return dt;
}
public DataRow getImage(long rowId) {
String where = KEY_ROWID_IMAGE + " = " + Convert.ToString(rowId);
DataTable dt = getAllWhere(DATABASE_TABLE_IMAGES, null, where);
DataRow dr = null;
if (dt.Rows.Count > 0) // should be just 1 row
dr = dt.Rows[0];
return dr;
}
public byte[] getImage(DataRow dr) {
try
{
object image = dr[KEY_IMAGE];
if (!Convert.IsDBNull(image))
return (byte[])image;
else
return null;
} catch(Exception) {
return null;
}
}
DataRow dri = getImage(rowId);
byte[] image = getImage(dri);
Since there is no complete example for C++ yet, this is how you can insert and retrieve an array/vector of float data without error checking:
#include <sqlite3.h>
#include <iostream>
#include <vector>
int main()
{
// open sqlite3 database connection
sqlite3* db;
sqlite3_open("path/to/database.db", &db);
// insert blob
{
sqlite3_stmt* stmtInsert = nullptr;
sqlite3_prepare_v2(db, "INSERT INTO table_name (vector_blob) VALUES (?)", -1, &stmtInsert, nullptr);
std::vector<float> blobData(128); // your data
sqlite3_bind_blob(stmtInsertFace, 1, blobData.data(), static_cast<int>(blobData.size() * sizeof(float)), SQLITE_STATIC);
if (sqlite3_step(stmtInsert) == SQLITE_DONE)
std::cout << "Insert successful" << std::endl;
else
std::cout << "Insert failed" << std::endl;
sqlite3_finalize(stmtInsert);
}
// retrieve blob
{
sqlite3_stmt* stmtRetrieve = nullptr;
sqlite3_prepare_v2(db, "SELECT vector_blob FROM table_name WHERE id = ?", -1, &stmtRetrieve, nullptr);
int id = 1; // your id
sqlite3_bind_int(stmtRetrieve, 1, id);
std::vector<float> blobData;
if (sqlite3_step(stmtRetrieve) == SQLITE_ROW)
{
// retrieve blob data
const float* pdata = reinterpret_cast<const float*>(sqlite3_column_blob(stmtRetrieve, 0));
// query blob data size
blobData.resize(sqlite3_column_bytes(stmtRetrieve, 0) / static_cast<int>(sizeof(float)));
// copy to data vector
std::copy(pdata, pdata + static_cast<int>(blobData.size()), blobData.data());
}
sqlite3_finalize(stmtRetrieve);
}
sqlite3_close(db);
return 0;
}
You need to use sqlite's prepared statements interface. Basically, the idea is that you prepare a statement with a placeholder for your blob, then use one of the bind calls to "bind" your data...
SQLite Prepared Statements
In C++ (without error checking):
std::string blob = ...; // assume blob is in the string
std::string query = "INSERT INTO foo (blob_column) VALUES (?);";
sqlite3_stmt *stmt;
sqlite3_prepare_v2(db, query, query.size(), &stmt, nullptr);
sqlite3_bind_blob(stmt, 1, blob.data(), blob.size(),
SQLITE_TRANSIENT);
That can be SQLITE_STATIC if the query will be executed before blob gets destructed.