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yes, you can create a timer that will start when the form is shown or change your code to make it better, less timer.
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ok i will try it
thank u soo much
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In wpf , using background worker i want to stop the sql server service than start sql service.
how i can achieve one by one, i mean once the sql server is stopped than only it gave a call for sql start service.
is there any way to do this ?, work completed method will call for both.
please help me with sample code.
help will be appreciated.
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Have a look at the ServiceController[^] class.
This has a WaitForStatus[^] method that is ideal for your requirements.
You can even specify a timespan if you want to.
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Hello, I have a doubt, how to save an image in the bank. I have a class to convert the image to byte and then save. I do not know the correct way, ask for help.
class:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Drawing.Imaging;
using ImagensTeste.Dados;
using System.Data.SqlClient;
using System.Windows.Forms;
namespace ImagensTeste.Negocio
{
class RegraNegocioFotos
{
private int id;
public int Id
{
get { return id; }
set { id = value; }
}
private string descricao;
public string Descricao
{
get { return descricao; }
set { descricao = value; }
}
private Image foto;
public Image Foto
{
get { return foto; }
set { foto = value; }
}
private Image foto1;
public Image Foto1
{
get { return foto1; }
set { foto1 = value; }
}
public byte[] ConvertImageToByteArray(Image image, ImageFormat imageFormat)
{
if (image == null)
return null;
MemoryStream ms = new MemoryStream();
image.Save(ms, imageFormat);
return ms.ToArray();
}
public Image ConvertByteArrayToImage(byte[] byteArray)
{
if (byteArray == null || byteArray.Length == 0)
{ return (null); }
return (Image.FromStream(new MemoryStream(byteArray)));
}
Banco dal = new Banco();
//Metodo inserir
public void InserirFoto()
{
try
{
dal.ComandoSQl("INSERT INTO tbFoto(descricao,foto, foto1) VALUES('" + Descricao + "','" + Foto + "','" + Foto1 + "')");
}
catch (Exception ex)
{
throw ex;
}
}
//Metodo atualizar
public void AtualizaFoto()
{
try
{
dal.ComandoSQl("UPDATE tbFoto set descricao='" + Descricao + "', foto='" + Foto + "', foto1='" + Foto1 + "'where id= " + Id + "");
}
catch (Exception ex)
{
throw ex;
}
}
//Metodo excluir
public void ExcluirFoto()
{
try
{
dal.ComandoSQl("DELETE FROM tbFoto where id= " + Id + "");
}
catch (Exception ex)
{
throw ex;
}
}
//Metodo preencher datagrid
public void PreencherDataGrid(DataGridView dgv)
{
dal.Consultar(dgv, "SELECT * FROM tbFoto");
}
//Metodo consultar codigo prefeitura
public void ConsultarId(DataGridView dgv)
{
dal.Consultar(dgv, "SELECT * FROM tbFoto WHERE id=" + Id + "");
}
//Metodo consultar razao social prefeitura
public void ConsultarNumero(DataGridView dgv)
{
dal.Consultar(dgv, "SELECT * FROM tbFoto WHERE descricao Like '%" + Descricao + "%'");
}
}
}
Form:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Configuration;
using ImagensTeste.Negocio;
namespace ImagensTeste
{
public partial class frmFoto : Form
{
public frmFoto()
{
InitializeComponent();
//Alterar do app.config
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
config.ConnectionStrings.ConnectionStrings["ImagensTeste.Properties.Settings.fotosConnectionString"].ConnectionString =
ConfigurationManager.ConnectionStrings["ImagensTeste.Properties.Settings.fotosConnectionString"].ConnectionString;
config.Save(ConfigurationSaveMode.Full);
// ler novamente a seção do HD
ConfigurationManager.RefreshSection("connectionStrings");
}
RegraNegocioFotos negocio = new RegraNegocioFotos();
private void habilitarControles()
{
txtDescricao.Enabled = true;
}
public void LimparCampo()
{
this.LimparCampo(this);
}
public void LimparCampo(Control parent)
{
foreach (Control cont in parent.Controls)
{
if (cont is TextBox)
(cont as TextBox).Text = "";
if (cont is PictureBox)
(cont as PictureBox).Text = "";
if (cont is ComboBox)
(cont as ComboBox).Text = "";
if (cont is MaskedTextBox)
(cont as MaskedTextBox).Text = "";
if (cont is RadioButton)
(cont as RadioButton).Checked = false;
if (cont is CheckBox)
(cont as CheckBox).Checked = false;
if (cont is RichTextBox)
(cont as RichTextBox).Text = "";
if (cont is CheckedListBox)
{
foreach (ListControl item in (cont as CheckedListBox).Items)
item.SelectedIndex = -1;
}
if (cont is ListView)
(cont as ListView).Items.Clear();
// varre os filhos...
this.LimparCampo(cont);
}
}
private void btnGravar_Click(object sender, EventArgs e)
{
try
{
// Campos obrigatorios
if ((txtDescricao.Text != "") && (txtDescricao.Text != ""))
{
{
RegraNegocioFotos cln = new RegraNegocioFotos();
cln.Descricao = this.txtDescricao.Text;
//???
cln.Foto = this.picBrasao.Image;
cln.InserirFoto();
{
txtDescricao.Focus();
}
LimparCampo();
MessageBox.Show("Documento cadastrada com sucesso", "Sucesso",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
{
txtDescricao.Focus();
}
}
else
{
MessageBox.Show("Campos Obrigatórios: Numero e Descrição", "Atenção", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
catch (Exception ex)
{
//Caso haja uma exceção será tratada neste código
MessageBox.Show("Não foi possível salvar pelo seguinte motivo: " + ex.Message);
}
}
private void btnProcurarImagen1_Click(object sender, EventArgs e)
{
openBrasao.Filter = "jpeg|*.jpg|bmp|*.bmp|all files|*.*";
DialogResult res = openBrasao.ShowDialog();
if (res == DialogResult.OK)
{
txtCaminho1.Text = openBrasao.FileName;
picBrasao.Image = Image.FromFile(openBrasao.FileName);
}
}
private void btnProcurarImagen2_Click(object sender, EventArgs e)
{
openLogo.Filter = "jpeg|*.jpg|bmp|*.bmp|all files|*.*";
DialogResult res = openLogo.ShowDialog();
if (res == DialogResult.OK)
{
txtCaminho2.Text = openLogo.FileName;
picLogo.Image = Image.FromFile(openLogo.FileName);
}
}
}
}
thank you...
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I'm not going to try to read all that and try to figure out what you're doing wrong, but I'll point out two bad things that jump out at me:
dal.ComandoSQl("UPDATE tbFoto set descricao='" + Descricao + "', foto='" + Foto + "', foto1='" + Foto1 + "'where id= " + Id + "");
Don't use concatenation to build a query; use a parameterized query (this may actually be the whole problem).
catch (Exception ex)<br />
{<br />
throw ex;<br />
}
This is actually three problems in one.
Try to catch a specific Exception rather than all Exceptions.
Don't catch and rethrow without doing anything else.
If you rethrow (after doing something else), then just use throw, not throw ex.
In this case, you can remove the entire try/catch.
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Hello altered the way can save but not found the way to update and delete, please ask for a sample and how do I save if an image field null, because in this instance can not.
private void btnGravar_Click(object sender, EventArgs e)
{
if (!String.IsNullOrEmpty(txtCaminho1.Text))
{
if (new FileInfo(txtCaminho1.Text).Exists)
{
if (!String.IsNullOrEmpty(txtCaminho1.Text))
{
if (!String.IsNullOrEmpty(txtCaminho2.Text))
{
if (new FileInfo(txtCaminho2.Text).Exists)
{
Image Image1 = Image.FromFile(txtCaminho1.Text);
Image Image2 = Image.FromFile(txtCaminho2.Text);
using (SqlConnection Conexao = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\fotos.mdf;Integrated Security=True;Connect Timeout=30"))
{
Conexao.Open();
using (SqlCommand Comando = Conexao.CreateCommand())
{
Comando.CommandType = CommandType.Text;
Comando.CommandText = "INSERT INTO tbFoto (descricao,foto,foto1) values(@descricao,@foto,@foto1);";
Comando.Parameters.Add("@descricao", System.Data.SqlDbType.VarChar, 50).Value = this.txtDescricao.Text;
Comando.Parameters.Add("@foto", SqlDbType.Image).Value = ConvertImageToByteArray(Image1, ImageFormat.Jpeg);
Comando.Parameters.Add("@foto1", SqlDbType.Image).Value = ConvertImageToByteArray(Image2, ImageFormat.Jpeg);
if (Comando.ExecuteNonQuery() > 0)
{
MessageBox.Show("Imagem gravada com êxito", "Imagem: Ok", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
Conexao.Close();
getImagensSQLServer(conexaoSQLServer);
LimparCampo();
btnGravar.Visible = false;
btnGravaNegocio.Visible = true;
}
}
else
{
MessageBox.Show("Imagem inválida", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
}
}
}
public byte[] ConvertImageToByteArray(Image image, ImageFormat imageFormat)
{
if (image == null)
return null;
MemoryStream ms = new MemoryStream();
image.Save(ms, imageFormat);
return ms.ToArray();
}
public Image ConvertByteArrayToImage(byte[] byteArray)
{
if (byteArray == null || byteArray.Length == 0)
{ return (null); }
return (Image.FromStream(new MemoryStream(byteArray)));
}
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I still won't read it thoroughly, but it seems better. 
To store a NULL, set the value of the parameter to DBNull.Value.
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Put it more in error
Comando.Parameters.Add("@foto1", SqlDbType.Image)DBNull.Value = ConvertImageToByteArray(Image2, ImageFormat.Jpeg);
error:
Error 1 ; expected
Error 2 A static readonly field cannot be assigned to (except in a static constructor or a variable initializer)
Error 3 Cannot implicitly convert type 'byte[]' to 'System.DBNull'
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No .
Comando.Parameters.AddWithVAlue("@foto1", DBNull.Value );
Also, don't bother trying to set the data type; the framework will do that when you set the value.
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Presents no error in the description, but when I run the application the error in
Comando.Parameters.Add("@descricao", System.Data.SqlDbType.VarChar, 50).Value = this.txtDescricao.Text;
Comando.Parameters.AddWithValue("@foto", DBNull.Value).Value = ConvertImageToByteArray(Image1, ImageFormat.Jpeg);
Comando.Parameters.AddWithValue("@foto1", DBNull.Value).Value = ConvertImageToByteArray(Image2, ImageFormat.Jpeg);
error:
if (Comando.ExecuteNonQuery() > 0)
The parameterized query '(@descricao varchar(50),@foto nvarchar(4000),@foto1 nvarchar(400' expects the parameter '@foto', which was not supplied.
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Then I don't know; report the SQL statement.
And remove the Value = ConvertImageToByteArray(Image2, ImageFormat.Jpeg) part.
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It worked like this:
if ((picBrasao.Image != null)
Comando.Parameters.AddWithValue("@foto", DBNull.Value).Value = ConvertImageToByteArray(picBrasao.Image, ImageFormat.Jpeg);
Thank you brother
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As PIEBALDconsult says, you shouldn't even think about concatenating strings to form an SQL command - not only does it leave you vulnerable to SQL Injection attacks which could damage or destriy your database, it also causes significant problems with Images as well.
See here: Why do I get a "Parameter is not valid." exception when I read an image from my database?[^] - it explains why it's a problem and how to save and reload the image properly.
This message is manufactured from fully recyclable noughts and ones. To recycle this message, please separate into two tidy piles, and take them to your nearest local recycling centre.
Please note that in some areas noughts are always replaced with zeros by law, and many facilities cannot recycle zeroes - in this case, please bury them in your back garden and water frequently.
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Hi All,
Im sure this is very simple but after googling for the past 4 hours i cannot seem to find the correct syntax.
I currenly have a SQL which amongst other tables has a DateTime Coloum in the folllowing Format:
2013-09-11 21:06:08:970
I am currently running the follow query from within my C# Application:
select * from table where errorcode = 448
What I would like to do is:
select * from table where errorcode = 448, where date = today
and also
select * from table where errorcode = 448, where date is between 2013-09-11 00:00:00:000 and 2013-09-11 23:59:59:999
I just cant figure out the correct syntax for the queries though.
Could anybody possible Help?
Many Thanks
SG
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If it's an SQL question (which it is) then it's not a C# question.
Are you using SQL Server? Or another system?
If SQL Server, then perhaps the following will help:
select * from [table] where errorcode = 448 <big>AND</big> CAST([date] AS DATE) = CAST(GETDATE() AS DATE)
P.S.
"has a DateTime Coloum in the folllowing Format:
2013-09-11 21:06:08:970
"
DATETIMEs have no such format; they're stored as numeric values, not strings.
modified 14-Sep-13 23:37pm.
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Perfect!
Thank you PIEBALDconsult!
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DateTime columns in SQL Server do not have a format. So, this means that you're storing dates/times as strings, NOT the DateTime format. Because of this little problem, you cannot use the BETWEEN clause. You MUST convert your column to DateTime and probably reload your data into the database.
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I have one GridControl Form can contain column of type image PictureEdit and 1 Button, when its current right-click the column cell of the selected images and photos from your computer to load. But when I click on the Button will not get the value of the image column, I wrote the following code:
using (MemoryStream stream = new MemoryStream())
{ repositoryItemPictureEdit1.Appearance.Image.Save(stream, ImageFormat.Jpeg);
}
The code on the report when it is run "Object reference not set to an instance of an object."
What do you know with his help, thank you very much.
modified 14-Sep-13 21:08pm.
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Then presumably, repositoryItemPictureEdit1 has not been initialised to refer to anything.
Veni, vidi, abiit domum
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Hi,
Please let me know, where I am doing wrong. because following program is not receiving text from notepad.
Thanks alot
using System;
using System.Diagnostics;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace READVALUES
{
public partial class Form1 : Form
{
[DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, long wParam, [MarshalAs(UnmanagedType.LPStr)] StringBuilder lParam);
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
Process[] processes = Process.GetProcessesByName("notepad");
foreach (Process p in processes)
{
string myGotWindow = p.MainWindowTitle;
IntPtr pFoundWindow = p.MainWindowHandle;
const uint WM_GETTEXT = 0x0D;
StringBuilder sb = new StringBuilder();
IntPtr retVal = SendMessage(pFoundWindow, WM_GETTEXT, 100, sb);
textBox1.Text = sb.ToString();
}
}
}
}
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Give these definitions a try.
[DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, [MarshalAs(UnmanagedType.LPStr)] StringBuilder lParam);
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, string windowTitle);
The reason for the FindWindowEx is so that you can find the child window that contains the text. If you use the MainWindowHandle, you will retrieve the window title. You need to find the child window whose class name is "Edit".
Also give the string builder an ample initial size. The default size is 16 characters.
I will leave it to you to write the logic to compare the returned number of characters against the stringbuilder's "Capacity" property to determine if you got all the text. If returned length is Capacity -1, there may be more text that you did not retrieve.
Process[] processes = Process.GetProcessesByName("notepad");
foreach (Process p in processes)
{
string myGotWindow = p.MainWindowTitle;
IntPtr pEditWindow = FindWindowEx(p.MainWindowHandle, IntPtr.Zero, "Edit", null);
const uint WM_GETTEXT = 0x0D;
StringBuilder sb = new StringBuilder(1000);
IntPtr retVal = SendMessage(pEditWindow, WM_GETTEXT, (IntPtr)sb.Capacity, sb);
textBox1.Text = sb.ToString();
}
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hi there,
i'm trying to run this code,
WPF Language Translator[^]
1) when i run the proj. it says "Make sure you are connected to internet" while i'm connected already...
2) help me regarding "appId" where to find it,
either it "Primary Account Key" or "Customer ID" or "Customer App Secret"..
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Post in the message section at the bottom of the article - perhaps the author can help you out.
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