I am inserting data in the sql server.Here is the code:
SqlParameter[] param = new SqlParameter[1];
param[0] = new SqlParameter();
param[0].ParameterName = "#Exch";
param[0].SqlDbType = SqlDbType.Int;
param[0].Value = "BSE";
formObjSqlConnection.SQLConnection.Executes("LPExch..DeleteVarMargin", param);
foreach (BseVar objBseVar in objListNseData)
{
currentIndex++;
param = new SqlParameter[10];
param[0] = new SqlParameter();
param[0].ParameterName = "#Exch";
param[0].SqlDbType = SqlDbType.Char;
param[0].Value = "BSE";
param[1] = new SqlParameter();
param[1].ParameterName = "#Symbol";
param[1].SqlDbType = SqlDbType.Char;
param[1].Size = 10;
param[1].Value = objBseVar.Symbol;
param[2] = new SqlParameter();
param[2].ParameterName = "#Series";
param[2].SqlDbType = SqlDbType.Char;
param[2].Value = "EQ";
param[3] = new SqlParameter();
param[3].ParameterName = "#SecurityVar";
param[3].SqlDbType = SqlDbType.SmallMoney;
param[3].Value = objBseVar.SecurityVar;
param[4] = new SqlParameter();
param[4].ParameterName = "#IndexVar";
param[4].SqlDbType = SqlDbType.SmallMoney;
param[4].Value = 0;
param[5] = new SqlParameter();
param[5].ParameterName = "#VarMargin";
param[5].SqlDbType = SqlDbType.SmallMoney;
param[5].Value = objBseVar.IndexVar;
param[6] = new SqlParameter();
param[6].ParameterName = "#AdhocMargin";
param[6].SqlDbType = SqlDbType.SmallMoney;
param[6].Value = objBseVar.SecurityVar - objBseVar.IndexVar;
param[7] = new SqlParameter();
param[7].ParameterName = "#VarMarginRate";
param[7].SqlDbType = SqlDbType.SmallMoney;
param[7].Value = objBseVar.IndexVar;
formObjSqlConnection.SQLConnection.Executes("LPExch..UpdateOrAddCashVarMarginBSE", param);
if (Convert.ToInt32(1 / progressChange * currentIndex) <= 100)
objImportMaster.UpdateProgressBar(Convert.ToInt32(1 / progressChange * currentIndex));
}
formObjSqlConnection.SQLConnection.Executes("LPExch..UpdateCashVarMarginBSEScripNo");
Is there any other way i can insert the data in the database.The problem is that database is taking too much time to insert the data.Also i am updating the progressbar in other UI.
Is that the reason for slow insertion?
Can we use any other way to insert data.?
Right now you are sending every insert one at a time. That's slow. If you can change the database, look up table valued parameters and pass a table to your function so you can send all the records just once.
If you have direct access to a table, you can also use bulk copy.
If you are trying to insert many records then consider using bulk copy, it is quite fast.
An example is available here.
Related
I have to assign 16 images that are randomized in an array to pictureboxes. I came up with the idea of creating an imagelist and then assign them to the pictureboxes.
Is there a way to shorten this?
This is the code that I came up with:
For i = 0 To FotoArray.Length - 1
ImageList1.Images.Add(Image.FromFile(FotoArray(i)))
Next
PictureBox1.Image = ImageList1.Images(0)
PictureBox2.Image = ImageList1.Images(1)
PictureBox3.Image = ImageList1.Images(2)
PictureBox4.Image = ImageList1.Images(3)
PictureBox5.Image = ImageList1.Images(4)
PictureBox6.Image = ImageList1.Images(5)
PictureBox7.Image = ImageList1.Images(6)
PictureBox8.Image = ImageList1.Images(7)
PictureBox9.Image = ImageList1.Images(8)
PictureBox10.Image = ImageList1.Images(9)
PictureBox11.Image = ImageList1.Images(10)
PictureBox12.Image = ImageList1.Images(11)
PictureBox13.Image = ImageList1.Images(12)
PictureBox14.Image = ImageList1.Images(13)
PictureBox15.Image = ImageList1.Images(14)
PictureBox16.Image = ImageList1.Images(15)
and also for this
Is there a way to make the same for this labels?
Label1.Tag = FotoArray(0)
Label2.Tag = FotoArray(1)
Label3.Tag = FotoArray(2)
Label4.Tag = FotoArray(3)
Label5.Tag = FotoArray(4)
Label6.Tag = FotoArray(5)
Label7.Tag = FotoArray(6)
Label8.Tag = FotoArray(7)
Label9.Tag = FotoArray(8)
Label10.Tag = FotoArray(9)
Label11.Tag = FotoArray(10)
Label12.Tag = FotoArray(11)
Label16.Tag = FotoArray(12)
Label13.Tag = FotoArray(13)
Label15.Tag = FotoArray(14)
Label14.Tag = FotoArray(15)
You can make use of the OfType Linq extension method to help make this code succint such as:
Dim pictureBoxes As List(Of PictureBox) = Me.Controls.OfType(Of PictureBox).ToList()
For counter As Integer = 0 To pictureBoxes.Count - 1
Dim pb As PictureBox = pictureBoxes(counter)
pb.Image = ImageList1.Images(counter)
Next
From MSDN:
Filters the elements of an IEnumerable based on a specified type.
A restore performed with C# code using SMO objects restores fine when original database is in SIMPLE recovery mode. We got problems with one database where the restore missed all content from a certain table, where all data was inserted late in process. The database showed to be in BULK LOGGED recovery mode. After changing to SIMPLE and doing a new backup, it restored fine, using our code.
We have tried different settings on the restore object, but found none that fixes the problem. We are under the impression that the restoring ignores data in the log.
The basic restore looks like this:
sqlServer = new Server(new ServerConnection(instanceName));
restore = GetRestore();
restore.PercentComplete += PercentCompleteAction;
restore.Complete += CompleteAction;
restore.SqlRestore(sqlServer);
the GetRestore function is basically implemented like this:
restore = new Restore();
var deviceItem = new BackupDeviceItem(backupFileName, DeviceType.File);
restore.Devices.Add(deviceItem);
restore.Database = newDatabaseName;
restore.NoRecovery = false;
restore.Action = RestoreActionType.Database;
restore.ReplaceDatabase = false;
return restore;
There are no error messages - just missing content in one table.
Added try:
I took a guess at the solution below, but it didn't help:
restore.ReplaceDatabase = false;
restore.NoRecovery = true;
restore.Action = RestoreActionType.Database;
restore.SqlRestore(sqlServer);
restore.ReplaceDatabase = true;
restore.NoRecovery = true;
restore.Action = RestoreActionType.Log;
restore.SqlRestore(sqlServer);
restore.ReplaceDatabase = true;
restore.NoRecovery = false;
restore.Action = RestoreActionType.Files;
restore.SqlRestore(sqlServer);
You need select a correct FileNumber in your Log file, see this method can solve your problem:
public static void restaurarBackup(string pathFileBak)
{
SqlConnection conn = new SqlConnection(Connection.getCon());
Server smoServer = new Server(new ServerConnection(conn));
string localFilePath = pathFileBak;
string db_name = "ETrade";
string defaultFolderEtrade = #"C:\ETrade\";
Restore rs = new Restore();
rs.NoRecovery = false;
rs.ReplaceDatabase = true;
BackupDeviceItem bdi = default(BackupDeviceItem);
bdi = new BackupDeviceItem(localFilePath, DeviceType.File);
rs.Devices.Add(bdi);
DataTable dt = rs.ReadFileList(smoServer);
foreach (DataRow r in dt.Rows)
{
string logicalFilename = r.ItemArray[dt.Columns["LogicalName"].Ordinal].ToString();
string physicalFilename = defaultFolderEtrade + Path.GetFileName(r.ItemArray[dt.Columns["PhysicalName"].Ordinal].ToString());
rs.RelocateFiles.Add(new RelocateFile(logicalFilename, physicalFilename));
}
DataTable backupHeaders = rs.ReadBackupHeader(smoServer);
rs.FileNumber = Convert.ToInt32(backupHeaders.AsEnumerable().Max(backupInfo => backupInfo["Position"]));
rs.Database = db_name;
smoServer.KillAllProcesses(rs.Database);
Microsoft.SqlServer.Management.Smo.Database db = smoServer.Databases[rs.Database];
db.DatabaseOptions.UserAccess = DatabaseUserAccess.Single;
rs.SqlRestore(smoServer);
db = smoServer.Databases[rs.Database];
db.SetOnline();
smoServer.Refresh();
db.Refresh();
}
If you want look backups in your Log file, see this query:
SELECT database_name, name, backup_start_date,
backup_finish_date, datediff(mi, backup_start_date, backup_finish_date) [tempo (min)],
position, first_lsn, last_lsn, server_name, recovery_model,
type, cast(backup_size/1024/1024 as numeric(15,2)) [Tamanho (MB)], B.is_copy_only
FROM msdb.dbo.backupset B
The Simple Preparation example in the docs (https://www.npgsql.org/doc/prepare.html#simple-preparation) shows an example where parameters are set after the command is prepared.
var cmd = new NpgsqlCommand(...);
cmd.Parameters.Add("param", NpgsqlDbType.Integer);
cmd.Prepare();
// Set parameters
cmd.ExecuteNonQuery();
// And so on
Questions
How are the parameters set?
Is it possible to use AddWithValue instead of Add if the AddWithValue(String, NpgsqlDbType, Object) method which specifies NpgsqlDbType is used -- docs say "setting the value isn't support"?
How does this work if multiple statements exist in the same command?
This answer (https://stackoverflow.com/a/53268090/10984827) shows that multiple commands in a single string can be prepared together but it's not clear how this CommandText string is created.
Edit: I think I'm almost there but I'm not sure how to create and execute the batched the query string. Here's my naive attempt at building a batched query using a StringBuilder. This doesn't work. How do I do this correctly?
using System;
using System.Collections.Generic;
using System.Text;
using Npgsql;
using NpgsqlTypes;
class Model
{
public int value1 { get; }
public int value2 { get; }
public Model(int value1, int value2)
{
this.value1 = value1;
this.value2 = value2;
}
}
class Program
{
static void Main(string[] args)
{
var dataRows = new List<Model>();
dataRows.Add(new Model(3,2));
dataRows.Add(new Model(27,-10));
dataRows.Add(new Model(11,-11));
var connString = "Host=127.0.0.1;Port=5432;Username=postgres;Database=dbtest1";
// tabletest1
// ----------
// id SERIAL PRIMARY KEY
// , value1 INT NOT NULL
// , value2 INT NOT NULL
using (var conn = new NpgsqlConnection(connString))
{
conn.Open();
var cmd = new NpgsqlCommand();
cmd.Connection = conn;
cmd.CommandText = $"INSERT INTO tabletest1 (value1,value2) VALUES (#value1,#value2)";
var parameterValue1 = cmd.Parameters.Add("value1", NpgsqlDbType.Integer);
var parameterValue2 = cmd.Parameters.Add("value2", NpgsqlDbType.Integer);
cmd.Prepare();
var batchCommand = new StringBuilder();
foreach (var d in dataRows)
{
parameterValue1.Value = d.value1;
parameterValue2.Value = d.value2;
batchCommand.Append(cmd.CommandText);
batchCommand.Append(";");
}
Console.WriteLine(batchCommand.ToString());
// conn.ExecuteNonQuery(batchCommand.ToString());
}
}
}
1) Simply capture the NpgsqlParameter returned from Add(), and then set its Value property:
var p = cmd.Parameters.Add("p", NpgsqlDbType.Integer);
cmd.Prepare();
p.Value = 8;
cmd.ExecuteNonQuery();
2) You can use AddWithValue() in the same way, but if you're preparing the command in order to reuse it several times, that makes less sense. The idea is that you first add the parameter without a value, then prepare, then execute it several times, setting the value each time.
3) You can prepare a multi-statement command. As things work now, all statements in the command will share the same parameter list (which lives on NpgsqlCommand). So the same pattern holds: create your command with your SQL and parameters, prepare it, and then set parameter values and execute. Each individual statement within your command will run prepared, benefiting from the perf increase.
Here's an example with two-statement batching:
cmd.CommandText = "INSERT INTO tabletest1 (value1,value2) VALUES (#v1,#v2); INSERT INTO tabletest1 (value1, value2) VALUES (#v3,#v4)";
var v1 = cmd.Parameters.Add("v1", NpgsqlDbType.Integer);
var v2 = cmd.Parameters.Add("v2", NpgsqlDbType.Integer);
var v3 = cmd.Parameters.Add("v3", NpgsqlDbType.Integer);
var v4 = cmd.Parameters.Add("v4", NpgsqlDbType.Integer);
cmd.Prepare();
while (...) {
v1.Value = ...;
v2.Value = ...;
v3.Value = ...;
v4.Value = ...;
cmd.ExecuteNonQuery();
}
However, if the objective is to efficiently insert lots of data, consider using COPY instead - it will be faster than even batched inserts.
Finally, to complete the picture, for INSERT statements specifically you can include more than one row in a single statement:
INSERT INTO tabletest1 (value1, value2) VALUES (1,2), (3,4)
You can also again parameterize the actual values, and prepare this command. This is similar to batching two INSERT statements, and should be faster (although still slower than COPY).
In NpgSQL 6.0 there has been the addition of batching/pipelining.
Here is an updated example:
await using var connection = new NpgsqlConnection(connString);
await connection.OpenAsync();
var batch = new NpgsqlBatch(connection);
const int count = 10;
const string parameterName = "parameter";
for (int i = 0; i < count; i++)
{
var batchCommand = new NpgsqlBatchCommand($"SELECT #{parameterName} as value");
batchCommand.Parameters.Add(new NpgsqlParameter(parameterName, i));
batch.BatchCommands.Add(batchCommand);
}
await batch.PrepareAsync();
var results = new List<int>(count);
await using (var reader = await batch.ExecuteReaderAsync())
{
do
{
while (await reader.ReadAsync())
{
results.Add(await reader.GetFieldValueAsync<int>("value"));
}
} while (await reader.NextResultAsync());
}
Console.WriteLine(string.Join(", ", results));
i have to read rows of data from an excel file which has only a column and then i have to save the rows in a table in database .
In my project i have to use ClosedXML .dll .
I have search but i couldn't find an example .
Can you please help me?
Thanks
For the ClosedXML part, you can refer to the documentation at https://github.com/ClosedXML/ClosedXML/wiki/Finding-and-extracting-the-data
private static void Main()
{
List<String> categories;
List<String> companies;
ExtractCategoriesCompanies("NorthwindData.xlsx", out categories, out companies);
// Do something with the categories and companies
}
private static void ExtractCategoriesCompanies(string northwinddataXlsx, out List<string> categories, out List<string> companies)
{
categories = new List<string>();
const int coCategoryId = 1;
const int coCategoryName = 2;
var wb = new XLWorkbook(northwinddataXlsx);
var ws = wb.Worksheet("Data");
// Look for the first row used
var firstRowUsed = ws.FirstRowUsed();
// Narrow down the row so that it only includes the used part
var categoryRow = firstRowUsed.RowUsed();
// Move to the next row (it now has the titles)
categoryRow = categoryRow.RowBelow();
// Get all categories
while (!categoryRow.Cell(coCategoryId).IsEmpty())
{
String categoryName = categoryRow.Cell(coCategoryName).GetString();
categories.Add(categoryName);
categoryRow = categoryRow.RowBelow();
}
// There are many ways to get the company table.
// Here we're using a straightforward method.
// Another way would be to find the first row in the company table
// by looping while row.IsEmpty()
// First possible address of the company table:
var firstPossibleAddress = ws.Row(categoryRow.RowNumber()).FirstCell().Address;
// Last possible address of the company table:
var lastPossibleAddress = ws.LastCellUsed().Address;
// Get a range with the remainder of the worksheet data (the range used)
var companyRange = ws.Range(firstPossibleAddress, lastPossibleAddress).RangeUsed();
// Treat the range as a table (to be able to use the column names)
var companyTable = companyRange.AsTable();
// Get the list of company names
companies = companyTable.DataRange.Rows()
.Select(companyRow => companyRow.Field("Company Name").GetString())
.ToList();
}
EDIT: The below only gets you a populated datatable. You'll then need to load that datatable into your database. You don't say which database this is, but for SQL Server you would use the SqlBulkCopy class (see definition, which also has an example).
Late to the party, but try this:
public static DataTable GetDataTableFromExcel(string path, string sheetname = "", bool hasHeader = true)
{
using (var workbook = new XLWorkbook(path))
{
IXLWorksheet worksheet;
if (string.IsNullOrEmpty(sheetname))
worksheet = workbook.Worksheets.First();
else
worksheet = workbook.Worksheets.FirstOrDefault(x => x.Name == sheetname);
var rangeRowFirst = worksheet.FirstRowUsed().RowNumber();
var rangeRowLast = worksheet.LastRowUsed().RowNumber();
var rangeColFirst = worksheet.FirstColumnUsed().ColumnNumber();
var rangeColLast = worksheet.LastColumnUsed().ColumnNumber();
DataTable tbl = new DataTable();
for (int col = rangeColFirst; col <= rangeColLast; col++)
tbl.Columns.Add(hasHeader ? worksheet.FirstRowUsed().Cell(col).Value.ToString() : $"Column {col}");
Logger("started creating datatable");
rangeRowFirst = rangeRowFirst + (hasHeader ? 1 : 0);
var colCount = rangeColLast - rangeColFirst;
for (int rowNum = rangeRowFirst; rowNum <= rangeRowLast; rowNum++)
{
List<string> colValues = new List<string>();
for (int col = 1; col <= colCount; col++)
{
colValues.Add(worksheet.Row(rowNum).Cell(col).Value.ToString());
}
tbl.Rows.Add(colValues.ToArray());
}
Logger("finished creating datatable");
return tbl;
}
}
and call like this:
var datatable = GetDataTableFromExcel(fileName, sheetName);
If you're using (the excellent and free in its basic form) LinqPad, you can inspect the datatable using datatable.Dump();
Can you fix my problem? I try to insert data in table database oracle, but the data take from session array.
this code controller to insert data
int[] NoId = (int[])Session["Id"];
string[] NamaBarang = (string[])Session["namaBarang"];
string[] HargaSatuan = (string[])Session["harga"];
string[] JumlahBarang = (string[])Session["jumlah"];
string[] HargaTotal = (string[])Session["total"];
string[] Diskon = (string[])Session["disc"];
string[] DPP = (string[])Session["Dpp"];
string[] PPN = (string[])Session["Ppn"];
MPMISTAX_DTLMASUK itemA = new MPMISTAX_DTLMASUK();
itemA.KD_PPN = "2";
itemA.KDUNIT = Kategori;
itemA.KODE_SUPP = "M2Z";
itemA.NOFAK = nomorFaktur;
itemA.KDFAK = kodeFaktur;
itemA.VKODECABANG = KodeMain;
item.TAHUN = TanggalFak.Year;
itemA.RETUR = "";
itemA.NMBRG = NamaBarang[0];
itemA.HRGSAT = HargaSatuan[0];
itemA.NPWP = npwpPenjual;
itemA.NODOK = "-";
dbContext.MPMISTAX_DTLMASUK.Add(itemA);
dbContext.SaveChanges();
I try using that code, but its error. I Hope you can help my problem. Thank you
What is the datatype of
itemA.NMBRG?
if it's long please convert the NamaBarang[0] to long datatype before assigning. Like
itemA.NMBRG = (long)NamaBarang[0];
Hope this helps!!
You are trying to assign string to a feild which is of type long .Parse the string to long for feild NMBRG.
itemA.NMBRG = (long)NamaBarang[0];