Develop Reference

When I try to load image from mysql database i get error "Parameter is not valid" and when i try to load an image from db

The program is made in C# and database is MySQL.
I have 2 errors, first one when program loads (parameter is not valid) and second one (You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '(Slika) values (_binary '?PNG).
So i tried the #blob thing (before i was only saving it as pictureBox which people said its false) and i get this error.
Also good to mention that i always get saved the same file which is BLOB - 55B.
This is the code:
private void button3_Click(object sender, EventArgs e)
{
con.OpenConnection2();
string query2 = "update tabla set (Slika) values (#Blob)";
cmd.Connection = Connectioncl.connection2;
cmd.CommandText = query2;
cmd.Parameters.AddWithValue("Blob", save(pictureBox3));
cmd.ExecuteNonQuery();
MessageBox.Show("Data Save in Database ", "Data Save", MessageBoxButtons.OK, MessageBoxIcon.Information);
pictureBox2.Image = pictureBox3.Image;
this.Refresh();
}
I get parameter is invalid in this code where image has to load from database as soon as program is started:
private void Form2_Load(object sender, EventArgs e)
{
try
{
textBox1.Text = Form1.id; //just to check if its the correct ID
con.OpenConnection();
label1.Text = Form1.ime;
label2.Text = Form1.prezime;
timer1.Start();
string query = "select * from tabla where ID='" + ID + "'";
cmd.Connection = Connectioncl.connection;
cmd.CommandText = query;
MySqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
pictureBox2.Image = displayImage((byte[])dr["Slika"]);
}
dr.Close();
con.CloseConnection();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
And here is the whole code of the Form2 (Form1 works perfectly fine):
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 MySql.Data.MySqlClient;
using System.IO;
namespace Maturski_Rad_1
{
public partial class Form2 : Form
{
Connectioncl con = new Connectioncl();
MySqlCommand cmd = new MySqlCommand();
string ID = Form1.id;
public Form2()
{
InitializeComponent();
}
public byte[] save(PictureBox pb)
{
MemoryStream mstr = new MemoryStream();
pictureBox3.Image.Save(mstr, pb.Image.RawFormat);
return mstr.GetBuffer();
}
public Image displayImage(byte[] slika)
{
MemoryStream mstr = new MemoryStream(slika);
return Image.FromStream(mstr);
}
private void Form2_Load(object sender, EventArgs e)
{
try
{
textBox1.Text = Form1.id; //just to check if its the correct ID
con.OpenConnection();
label1.Text = Form1.ime;
label2.Text = Form1.prezime;
timer1.Start();
string query = "select * from tabla where ID='" + ID + "'";
cmd.Connection = Connectioncl.connection;
cmd.CommandText = query;
MySqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
pictureBox2.Image = displayImage((byte[])dr["Slika"]);
}
dr.Close();
con.CloseConnection();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void toolTip1_Popup(object sender, PopupEventArgs e)
{
}
private void button2_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void panel1_MouseHover(object sender, EventArgs e)
{
toolTip1.Show("Vas ID je: " + Form1.id, panel1);
toolTip1.UseFading = true;
}
private void label3_Click(object sender, EventArgs e)
{
}
private void timer1_Tick(object sender, EventArgs e)
{
label4.Text = DateTime.Now.ToShortTimeString();
}
private void button1_Click(object sender, EventArgs e)
{
try
{
OpenFileDialog dialog = new OpenFileDialog();
dialog.Title = "Odaberite sliku";
dialog.Filter = " (*.jpg;*.png;*.jpeg) | *.jpg;*.png;*.jpeg";
DialogResult dr = new DialogResult();
dr = dialog.ShowDialog();
if (dr == DialogResult.OK)
{
pictureBox3.Image = new Bitmap(dialog.FileName);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void button3_Click(object sender, EventArgs e)
{
con.OpenConnection2();
string query2 = "update tabla set (Slika) values (#Blob)";
cmd.Connection = Connectioncl.connection2;
cmd.CommandText = query2;
cmd.Parameters.AddWithValue("Blob", save(pictureBox3));
cmd.ExecuteNonQuery();
MessageBox.Show("Data Save in Database ", "Data Save", MessageBoxButtons.OK, MessageBoxIcon.Information);
pictureBox2.Image = pictureBox3.Image;
this.Refresh();
}
private void pictureBox1_Click(object sender, EventArgs e)
{
if (panel3.Visible = !panel3.Visible)
{
panel3.Visible = panel3.Visible;
}
else if(panel3.Visible = panel3.Visible)
{
panel3.Visible = !panel3.Visible;
}
}
}
}
Thanks for any help!!
UPDATE
So I have decided to insert full data and image directly to table in phpmyadmin and when I entered credentials no errors were showing.
It just seems to be an error while converting to blob while updating the table, now if someone can help me with this i'm pretty new to C# and MySQL especially.
[1]: https://i.stack.imgur.com/KUK7a.png
UPDATE #2
I have changed mstr.GetBuffer() to mstr.GetArray(), also I added few lines to code and there are no more errors at saving picture, but I still have problem when it gets saved its corrupted or it just doesn't convert correctly.
When image gets uploaded it doesn't take nearly as much memory as same image i inserted directly into the table which had no problem loading into program.
So now it's just problem converting to binary ! guess, any help is appreciated!
This is how code looks after I added couple lines to save button:
private void button3_Click(object sender, EventArgs e)
{
byte[] ImageData;
FileStream fs = new FileStream(fname, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
ImageData = br.ReadBytes((int)fs.Length);
br.Close();
fs.Close();
con.OpenConnection2();
string query2 = "update tabla set Slika = '" + ImageData + "' where ID = '" + ID + "'";
cmd.Connection = Connectioncl.connection2;
cmd.CommandText = query2;
cmd.Parameters.AddWithValue("Slika", ImageData);
cmd.ExecuteNonQuery();
MessageBox.Show("Data Save in Database ", "Data Save", MessageBoxButtons.OK, MessageBoxIcon.Information);
this.Refresh();
con.CloseConnection2();
}

I am happy to say that the problem has been fixed, it was indeed problem with saving picture to the database.
The problem was that I had to add parameter MySqlDbType.Blob like so:
cmd.Parameters.Add("#Slika", MySqlDbType.Blob);
And then I had to give that parameter the picture, like so:
cmd.Parameters["#Slika"].Value = ImageData;
Easy as that, feels much more rewarding when you solve the problem yourself :D
I will post the whole code so if someone wants to use it feel free.
Code:
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 MySql.Data.MySqlClient;
using System.IO;
namespace Maturski_Rad_1
{
public partial class Form2 : Form
{
Connectioncl con = new Connectioncl();
MySqlCommand cmd = new MySqlCommand();
string ID = Form1.id;
string fname;
public Form2()
{
InitializeComponent();
}
public Image displayImage(byte[] slika)
{
MemoryStream mstr = new MemoryStream(slika);
return Image.FromStream(mstr);
}
private void Form2_Load(object sender, EventArgs e)
{
try
{
textBox1.Text = Form1.id; //just to check if its the correct ID
con.OpenConnection();
label1.Text = Form1.ime;
label2.Text = Form1.prezime;
timer1.Start();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
try {
string query = "select Slika,ID from tabla where ID='" + ID + "'";
cmd.Connection = Connectioncl.connection;
cmd.CommandText = query;
MySqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
pictureBox2.Image = displayImage((byte[])dr["Slika"]);
}
dr.Close();
con.CloseConnection();
}
catch
{
MessageBox.Show("Error: Profilna slika nije pronadjena!");
}
}
private void toolTip1_Popup(object sender, PopupEventArgs e)
{
}
private void button2_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void panel1_MouseHover(object sender, EventArgs e)
{
toolTip1.Show("Vas ID je: " + Form1.id, panel1);
toolTip1.UseFading = true;
}
private void label3_Click(object sender, EventArgs e)
{
}
private void timer1_Tick(object sender, EventArgs e)
{
label4.Text = DateTime.Now.ToShortTimeString();
}
private void button1_Click(object sender, EventArgs e)
{
try
{
OpenFileDialog dialog = new OpenFileDialog();
dialog.Title = "Odaberite sliku";
dialog.Filter = " (*.jpg;*.png;*.jpeg) | *.jpg;*.png;*.jpeg";
DialogResult dr = new DialogResult();
dr = dialog.ShowDialog();
if (dr == DialogResult.OK)
{
pictureBox3.Image = new Bitmap(dialog.FileName);
fname = dialog.FileName;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void button3_Click(object sender, EventArgs e)
{
byte[] ImageData;
FileStream fs = new FileStream(fname, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
ImageData = br.ReadBytes((int)fs.Length);
br.Close();
fs.Close();
con.OpenConnection2();
string query2 = "update tabla set Slika= #Slika where ID = '" + ID + "'";
cmd.Connection = Connectioncl.connection2;
cmd.CommandText = query2;
cmd.Parameters.Add("#Slika", MySqlDbType.Blob);
cmd.Parameters["#Slika"].Value = ImageData;
cmd.ExecuteNonQuery();
MessageBox.Show("Data Save in Database ", "Data Save", MessageBoxButtons.OK, MessageBoxIcon.Information);
con.CloseConnection2();
pictureBox2.Image = pictureBox3.Image;
}
private void pictureBox1_Click(object sender, EventArgs e)
{
pictureBox3.Image = pictureBox2.Image;
if (panel3.Visible = !panel3.Visible)
{
panel3.Visible = panel3.Visible;
}
else if(panel3.Visible = panel3.Visible)
{
panel3.Visible = !panel3.Visible;
}
}
}
}
Enjoy!
PS. Slika or #Slika means image in my language, its just that I called my image column in the database like that.

Windows Form App (.NET Framework) CRUD Project, changes successfully saves into DataGridView, but not the actual Database Table

This is my first time using C# and SQL. I've managed to get the datagridview to work, be it insert, update or delete. However, all the changes that is reflected in the datagridview is NOT updating in the SQL Table (When I open the database and click "Show Table Data", the Insert, Update and Delete changes are not reflected there.)
Please Help! All the videos I've searched up only shows their datagridview changes being reflected, but doesn't show if their SQL Table is actually updated.
My Code:
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 System.Runtime.InteropServices;
namespace CRUDProj
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
displaydata();
button3.Visible = false;
DataGridViewCheckBoxColumn chk = new DataGridViewCheckBoxColumn();
chk.HeaderText = "Select";
chk.ValueType = typeof(bool);
chk.Name = "chkbox";
infoDataGridView.Columns.Insert(0, chk);
}
private void Form1_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'cRUDDBDataSet.Info' table. You can move, or remove it, as needed.
this.infoTableAdapter.Fill(this.cRUDDBDataSet.Info);
}
private void infoBindingNavigatorSaveItem_Click(object sender, EventArgs e)
{
this.Validate();
this.infoBindingSource.EndEdit();
this.tableAdapterManager.UpdateAll(this.cRUDDBDataSet);
}
private void displaydata()
{
string mainconn = ConfigurationManager.ConnectionStrings["CRUDProj.Properties.Settings.CRUDDBConnectionString"].ConnectionString;
SqlConnection sqlconn = new SqlConnection(mainconn);
string sqlquery = "select * from [dbo].[Info]";
sqlconn.Open();
SqlCommand sqlcomm = new SqlCommand(sqlquery, sqlconn);
DataTable dt = new DataTable();
SqlDataAdapter sdr = new SqlDataAdapter(sqlcomm);
sdr.Fill(dt);
infoDataGridView.DataSource = dt;
sqlconn.Close();
}
private void button1_Click(object sender, EventArgs e)
{
string mainconn = ConfigurationManager.ConnectionStrings["CRUDProj.Properties.Settings.CRUDDBConnectionString"].ConnectionString;
SqlConnection sqlconn = new SqlConnection(mainconn);
string sqlquery = "insert into [dbo].[Info] values (#Id, #FullName, #NRIC, #Phone, #Temperature, #LocationLevel, #Date)";
sqlconn.Open();
SqlCommand sqlcomm = new SqlCommand(sqlquery, sqlconn);
sqlcomm.Parameters.AddWithValue("#Id", iDTextBox.Text);
sqlcomm.Parameters.AddWithValue("#FullName", fullNameTextBox.Text);
sqlcomm.Parameters.AddWithValue("#NRIC", nRICTextBox.Text);
sqlcomm.Parameters.AddWithValue("#Phone", phoneTextBox.Text);
sqlcomm.Parameters.AddWithValue("#Temperature", temperatureTextBox.Text);
sqlcomm.Parameters.AddWithValue("#LocationLevel", locationLevelTextBox.Text);
sqlcomm.Parameters.AddWithValue("#Date", dateTextBox.Text);
sqlcomm.ExecuteNonQuery();
MessageBox.Show("Record Successfully Inserted");
displaydata();
sqlconn.Close();
}
public string message = string.Empty;
private void button2_Click(object sender, EventArgs e)
{
foreach(DataGridViewRow row in infoDataGridView.Rows)
{
bool issellected = Convert.ToBoolean(row.Cells["chkbox"].Value);
if (issellected)
{
message = Environment.NewLine;
message = row.Cells[1].Value.ToString();
}
}
label1.Text = message;
label1.Visible = true;
button3.Visible = true;
button1.Enabled = false;
button2.Enabled = false;
button4.Enabled = false;
button5.Enabled = false;
}
private void button3_Click(object sender, EventArgs e)
{
string mainconn = ConfigurationManager.ConnectionStrings["CRUDProj.Properties.Settings.CRUDDBConnectionString"].ConnectionString;
SqlConnection sqlconn = new SqlConnection(mainconn);
string sqlquery = "update [dbo].[Info] set Id=#Id, FullName=#FullName, NRIC=#NRIC, Phone=#Phone, Temperature=#Temperature, LocationLevel=#LocationLevel, Date=#Date where Id=#Id";
sqlconn.Open();
SqlCommand sqlcomm = new SqlCommand(sqlquery, sqlconn);
sqlcomm.Parameters.AddWithValue("#Id" ,label1.Text);
sqlcomm.Parameters.AddWithValue("#FullName", fullNameTextBox.Text);
sqlcomm.Parameters.AddWithValue("#NRIC", nRICTextBox.Text);
sqlcomm.Parameters.AddWithValue("#Phone", phoneTextBox.Text);
sqlcomm.Parameters.AddWithValue("#Temperature", temperatureTextBox.Text);
sqlcomm.Parameters.AddWithValue("#LocationLevel", locationLevelTextBox.Text);
sqlcomm.Parameters.AddWithValue("#Date", dateTextBox.Text);
sqlcomm.ExecuteNonQuery();
infoTableAdapter.Update(cRUDDBDataSet.Info);
sqlconn.Close();
MessageBox.Show("Record Updated Successfully! ");
displaydata();
button3.Visible = false;
button1.Enabled = true;
button2.Enabled = true;
button4.Enabled = true;
button5.Enabled = true;
DataRowView drv = infoDataGridView.CurrentRow.DataBoundItem as DataRowView;
DataRow[] rowsToUpdate = new DataRow[] { drv.Row };
SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM dbo.Info", sqlconn);
SqlCommandBuilder builder = new SqlCommandBuilder(adapter);
adapter.Update(rowsToUpdate);
this.infoTableAdapter.Update(this.cRUDDBDataSet.Info);
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void button5_Click(object sender, EventArgs e)
{
string mainconn = ConfigurationManager.ConnectionStrings["CRUDProj.Properties.Settings.CRUDDBConnectionString"].ConnectionString;
SqlConnection sqlconn = new SqlConnection(mainconn);
List<String> empselect = new List<String>();
DataGridViewRow row = new DataGridViewRow();
for (int i = 0; i<= infoDataGridView.Rows.Count-1; i++)
{
row = infoDataGridView.Rows[i];
if (Convert.ToBoolean(row.Cells [0].Value)==true)
{
string id = row.Cells[1].Value.ToString();
empselect.Add(id);
}
sqlconn.Open();
foreach (string s in empselect)
{
SqlCommand sqlcomm = new SqlCommand("delete from [dbo].[Info] where Id = ' " + s + " ' ", sqlconn);
sqlcomm.ExecuteNonQuery();
}
sqlconn.Close();
}
MessageBox.Show("Record Deleted Successfully! ");
displaydata();
}
private void iDTextBox1_TextChanged(object sender, EventArgs e)
{
}
private void button4_Click(object sender, EventArgs e)
{
iDTextBox.Clear();
fullNameTextBox.Clear();
nRICTextBox.Clear();
phoneTextBox.Clear();
temperatureTextBox.Clear();
locationLevelTextBox.Clear();
dateTextBox.Clear();
}
}
}

Bind your DGV to Database this will help you to perform crud operations easily.
This is a sample code on DGV to perform some actions may it will help you. but make sure that you bind your DGV to the database table.
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
_id = Convert.ToInt16(dataGridView1.Rows[e.RowIndex].Cells[0].Value);
string _name = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();
string _lname = dataGridView1.Rows[e.RowIndex].Cells[2].Value.ToString();
string _sex = dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();
string _age = dataGridView1.Rows[e.RowIndex].Cells[4].Value.ToString();
if (e.ColumnIndex == dataGridView1.Columns["delete"].Index && e.RowIndex >= 0)
{
if(groupBox1.Visible==true)
{
groupBox1.Visible = false;
}
_id = Convert.ToInt16(dataGridView1.Rows[e.RowIndex].Cells[0].Value);
DialogResult result = MessageBox.Show("Do You Want to delete?", "Delete", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);
if (result.Equals(DialogResult.OK) && service.deleterecord(_id, _name, _lname, _age, _sex))
{
MessageBox.Show("deleted record");
this.Close();
}
else
{
MessageBox.Show("not deleted");
}
}
if (e.ColumnIndex == dataGridView1.Columns["edit"].Index && e.RowIndex >= 0)
{
groupBox1.Visible = true;
firstname.Text = _name;
lastname.Text = _lname;
gender.Text = _sex;
age.Text = _age;
}
}
private void update_Click(object sender, EventArgs e)
{
string _fname = firstname.Text;
string _lname = lastname.Text;
string _age = age.Text;
string _sex = gender.Text;
try
{
if (string.IsNullOrWhiteSpace(_fname) || string.IsNullOrWhiteSpace(_lname) || string.IsNullOrWhiteSpace(_age) || string.IsNullOrWhiteSpace(_sex) || gender.Equals(null))
{
MessageBox.Show("Please enter the empty fields");
}
else
{
if (Updatedata("Update Query"))
{
MessageBox.Show("Record Updated");
//this.recordTableAdapter.Fill(this.task2DataSet.record);
groupBox1.Visible = false;
this.Size = new Size(595, 258);
this.Close();
}
else
{
MessageBox.Show("Failed to update");
}
}
}
catch (FormatException ex)
{
MessageBox.Show(ex.Message);
}
catch (ArgumentNullException ex)
{
MessageBox.Show(ex.Message);
}
}

Edit a listview line on another page with textboxes

I have to create a page an aspx page that allows me to modify the data of the listview row that are associated to a db, but I can't get the values.
I tried to do a query string
protected void EditButton_Click(object sender, EventArgs e)
{
int id = Convert.ToInt32(((Button)sender).Attributes["ID_Persona"]);
Response.Redirect("http://localhost:60082/pages/Edit.aspx" + "?
ID_Persona=" + id);
}
and to take the value on the page where I need it
protected void Page_Load(object sender, EventArgs e)
{
TextBox1.Text = Request.QueryString.Get("ID_Persona").ToString();
}
but I don't know how to display the line I want to edit in the textboxes.
this is the button that redirects to the edit page
protected void EditButton_Click(object sender, EventArgs e)
{
int id = Convert.ToInt32(((Button)sender).Attributes["ID_Persona"]);
Response.Redirect("http://localhost:60082/pages/Edit.aspx" + "?
ID_Persona=" + id);
}
this is the edit page
public partial class Edit : System.Web.UI.Page
{
string constr =
ConfigurationManager.ConnectionStrings["dbConnection"].ConnectionString;
protected void Page_Load(object sender, EventArgs e)
{
TextBox1.Text = Request.QueryString.Get("ID_Persona").ToString();
}
protected void CustomerUpdate(object sender, EventArgs e)
{
CustomerUpdate();
}
private int Id
{
get
{
return !string.IsNullOrEmpty(Request.QueryString["ID"]) ? int.Parse(Request.QueryString["ID"]) : 0;
}
}
private void CustomerUpdate()
{
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("UPDATE Persona SET Nome=#Nome, Cognome=#Cognome,Email=#Email,CodiceFiscale=#CodiceFiscale WHERE ID=#ID", con))
{
cmd.Parameters.AddWithValue("Nome", TextBox1.Text);
cmd.Parameters.AddWithValue("Cognome", TextBox15.Text);
cmd.Parameters.AddWithValue("Email", TextBox20.Text);
cmd.Parameters.AddWithValue("CodiceFiscale",TextBox22.Text);
cmd.Parameters.AddWithValue("ID", "");
con.Open();
cmd.ExecuteNonQuery();
con.Close();
Response.Redirect(Request.Url.AbsoluteUri, false);
Response.Redirect("Dash.aspx");
}
}
}
}

I think that you shuld make public the methods which sends the information like the query but i'm not sure that will work.

I solved that
if (queryy == "1")
{
B2.Visible = false;
var connectionString =
ConfigurationManager.ConnectionStrings["dbConnection"].ConnectionString;
string query = "SELECT ID,Nome,Cognome,Email,CodiceFiscale FROM
Persona WHERE ID = #id";
using (SqlConnection con = new SqlConnection(connectionString))
{
using (var cmd = new SqlCommand(query, con))
{
cmd.Parameters.AddWithValue("#ID",
Request.QueryString.Get("ID_Persona"));
con.Open();
using (var rdr = cmd.ExecuteReader())
{
if (rdr.Read())
{
TextBox1.Text = rdr["Nome"].ToString();
TextBox15.Text = rdr["Cognome"].ToString();
TextBox20.Text = rdr["Email"].ToString();
TextBox22.Text = rdr["CodiceFiscale"].ToString();
}
}
}
}

Yahoo weather Forecast c#

Looking for Getting current weather and weather forecast for London
woeid 44418
https://query.yahooapis.com/v1/public/yql? q=select%20*%20from%20weather.forecast%20where%20woeid%20in%20(select%20woeid%20from%20geo.places(1)%20where%20woeid%20%3D044418)&format=xml&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys
How to get forecast for this ?
Following is code for weather today .
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.Xml;
using MySql.Data.MySqlClient;
using System.Windows.Forms.DataVisualization.Charting;
using System.Runtime.InteropServices;
namespace weatherstation1
{
public partial class Form2 : Form
{
string Town;
string Temperature;
string Temperature2;
string Condition;
string Humidity;
string Windspeed;
string ConditionCode;
int cityNumber = 44418;
public Form2()
{
InitializeComponent();
Getweather();
GetCondition();
textBox1.Text = Town;
textBox3.Text = Condition;
textBox4.Text = Humidity;
textBox5.Text = Windspeed;
}
private void toolStripLabel1_Click(object sender, EventArgs e)
{
}
private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
{
AboutBox1 frmAbout = new AboutBox1();
frmAbout.Show();
}
private void Form2_Load(object sender, EventArgs e)
{
}
private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
{
this.Show();
}
private void contextMenuStrip1_Opening(object sender, CancelEventArgs e)
{
}
private void aboutToolStripMenuItem1_Click(object sender, EventArgs e)
{
AboutBox1 frmAbout = new AboutBox1();
frmAbout.Show();
}
private void Getweather()
{
string query = String.Format("https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20weather.forecast%20where%20woeid%20in%20(select%20woeid%20from%20geo.places(1)%20where%20woeid%20%3D044418)&format=xml&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys");
XmlDocument wData = new XmlDocument();
wData.Load(query);
XmlNamespaceManager manager = new XmlNamespaceManager(wData.NameTable);
manager.AddNamespace("yweather", "http://xml.weather.yahoo.com/ns/rss/1.0");
XmlNode channel = wData.SelectSingleNode("rss").SelectSingleNode("channel");
XmlNodeList nodes = wData.SelectNodes("/rss/channel/item/yweather:forecast", manager);
Temperature = channel.SelectSingleNode("item").SelectSingleNode("yweather:condition", manager).Attributes["temp"].Value;
Temperature2 = ((Double.Parse(Temperature) - 32) / 1.8).ToString();
Condition = channel.SelectSingleNode("item").SelectSingleNode("yweather:condition", manager).Attributes["text"].Value;
ConditionCode = channel.SelectSingleNode("item").SelectSingleNode("yweather:condition", manager).Attributes["code"].Value;
Time = channel.SelectSingleNode("item").SelectSingleNode("yweather:condition", manager).Attributes["date"].Value;
// Windspeed = channel.SelectSingleNode("yweather:wind", manager).Attributes["speed"].Value;
// Town = channel.SelectSingleNode("yweather:location", manager).Attributes["city"].Value;
}
private void database()
{
// string Time = DateTime.Now.ToString("d/M/yyyy HH:mm");
string MyConnection = "datasource=localhost;database=weatherstation;port=3306;username=weatherstation;password=123456";
MySqlConnection MyConn = new MySqlConnection(MyConnection);
string query1 = "INSERT INTO weatherstation1.London"+
"(City, Time, Temperature, Temperature2, WeatherCondition) VALUES('" + Town +
"','" + Time + "','" + Temperature + "','" + Temperature2 + "' + Condition + "');";
MySqlCommand MyCommand = new MySqlCommand(query1, MyConn);
MySqlDataReader MyReader;
MyConn.Open();
MyReader = MyCommand.ExecuteReader();
}
public void GetCondition()
{
string cc = ConditionCode;
if (cc <= 'Showers')
{
weatherCondition.ImageLocation = "showers.png";
}
else if (cc <= 'Scattered Showers')
{
weatherCondition.ImageLocation = "scatteredshowers.png";
}
else if (cc <= 'Mostly Cloudy')
{
weatherCondition.ImageLocation = "mostlycloudy.png";
}
else if (cc <= 'Rain')
{
weatherCondition.ImageLocation = "rain.png";
}
else if (cc <= 'Mostly Cloudy')
{
weatherCondition.ImageLocation = "mostlycloudy.png";
}
else if (cc <= 'Rain')
{
weatherCondition.ImageLocation = "rain.png";
}
else if (cc >= 'Scattered Thunderstorms')
{
weatherCondition.ImageLocation = "scatteredthunderstorms.png";
}
}
private void button1_Click(object sender, EventArgs e)
{
}
private void button1_Click_1(object sender, EventArgs e)
{
Getweather();
textBox1.Text = Town;
textBox3.Text = Condition;
//textBox4.Text = Humidity;
//textBox5.Text = Windspeed;
}
private void button2_Click(object sender, EventArgs e)
{
database();
}
private void closeToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Close();
}
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
this.WindowState = FormWindowState.Maximized;
}
private void refreshToolStripMenuItem_Click(object sender, EventArgs e)
{
database();
}
private void tabPage1_Click(object sender, EventArgs e)
{
}
private void graph()
{
if (radioButton2.Checked)
{
MySqlDataReader MyReader2;
string MyConnection = "datasource=localhost;database=weatherstation;port=3306;username=weatherstation;password=123456";
MySqlConnection MyConn2 = new MySqlConnection(MyConnection);
MyConn2.Open();
string query2 = " SELECT * FROM London ";
MySqlCommand MyCommand2 = new MySqlCommand(query2, MyConn2);
MyReader2 = MyCommand2.ExecuteReader();
while (MyReader2.Read())
{
chart1.Series["Series1"].Points.AddXY(MyReader2.GetString("Time"), MyReader2.GetString("Temperature"));
chart1.Series["Series1"].ChartType = SeriesChartType.FastLine;
chart1.Series["Series1"].Color = Color.Blue;
}
}
if (radioButton1.Checked)
{
MySqlDataReader MyReader2;
string MyConnection = "datasource=localhost;database=weatherstation;port=3306;username=weatherstation;password=123456";
MySqlConnection MyConn2 = new MySqlConnection(MyConnection);
MyConn2.Open();
string query2 = " SELECT * FROM London ";
MySqlCommand MyCommand2 = new MySqlCommand(query2, MyConn2);
MyReader2 = MyCommand2.ExecuteReader();
while (MyReader2.Read())
{
chart1.Series["Series1"].Points.AddXY(MyReader2.GetString("Time"), MyReader2.GetString("Temperature2"));
chart1.Series["Series1"].ChartType = SeriesChartType.FastLine;
chart1.Series["Series1"].Color = Color.Blue;
}
}
}
private void button3_Click(object sender, EventArgs e)
{
graph();
Getweather();
database();
}
private void timer1_Tick(object sender, EventArgs e)
{
graph();
Getweather();
database();
}
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
double celc = (Int32.Parse(Temperature) - 32) / (1.8);
string Temperature2 = celc.ToString();
textBox2.Text = Temperature2;
}
private void radioButton2_CheckedChanged(object sender, EventArgs e)
{
textBox2.Text = Temperature;
}
private void textBox7_TextChanged(object sender, EventArgs e)
{
}
private void button4_Click(object sender, EventArgs e)
{
cityNumber = Int32.Parse(textBox7.Text);
timer1.Interval = Int32.Parse(textBox8.Text);
}
private void optionsToolStripMenuItem_Click(object sender, EventArgs e)
{
}
private void tabPage3_Click(object sender, EventArgs e)
{
}
private void toolStripTextBox1_Click(object sender, EventArgs e)
{
Getweather();
toolStripTextBox1.Text = "Temperature:" + Temperature + " F";
}
private void weatherCondition_Click(object sender, EventArgs e)
{
}
}
}
For database in localhost
CREATE TABLE London
(ID INT NOT NULL AUTO_INCREMENT, City VARCHAR(30) NOT NULL, Time VARCHAR(20) NOT NULL, Temperature VARCHAR(5) NOT NULL, Temperature2 VARCHAR(5) NOT NULL, WeatherCondition VARCHAR(30) NOT NULL, PRIMARY KEY (ID));

Can only say for Yahoo Weather JSON format. The result will be in query.results.channel.item.forecast. Check out the following example, which uses Newtonsoft.Json for JSON parsing:
dynamic jsonData = JObject.Parse(responseFromServer);
if (jsonData["query"].count == 0)
{
throw new Exception("Failed to obtain forecast from the server.");
}
var convertFromFtoC = jsonData["query"].results.channel.units.temperature == "F";
foreach (var v in jsonData["query"].results.channel.item.forecast)
{
var date = (DateTime)v.date;
var tempLo = (int)v.low;
var tempHi = (int)v.high;
if (convertFromFtoC)
{
tempLo = TemperatureConverter.FahrenheitToCelcius(tempLo);
tempHi = TemperatureConverter.FahrenheitToCelcius(tempHi);
}
dailyForecst.Add(new ForecastDataForTheDay { Date = date, TempLo = tempLo, TempHi = tempHi });
}

How can I add search button code where I just want to find record and want to display it in listBoxes

I am new to C# and I am making a simple database project in which I want to add a functionality in which if user enter the identity number and click the button all the records will be displayed in the list boxes... Please help me to complete it... the code I want to add is in the last section of the code in button2_click.
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;
namespace main_form
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=windowDb;Integrated Security=True;Pooling=False");
SqlCommand command = new SqlCommand();
//SqlDataReader dataSearch;
private void Form1_Load(object sender, EventArgs e) {}
private void monthCalendar1_DateChanged(object sender, DateRangeEventArgs e) {}
private void btn_save_Click(object sender, EventArgs e)
{
if(id_Txt.Text!=""& f_txt.Text!=""& Lname_txt.Text!=""& m_txt.Text!=""& dateTimePicker1.Text!=""){
command.Connection = con;
con.Open();
command.CommandText = "insert into people(id,fname,lname,mobile,TDATE) values('"+id_Txt.Text+"','"+f_txt.Text+"','"+Lname_txt.Text+"','"+m_txt.Text+"','"+dateTimePicker1.Text/*Value.ToString()*/+"')";
command.ExecuteNonQuery();
con.Close();
MessageBox.Show("Data Saved Successfully");
id_Txt.Clear();
f_txt.Clear();
Lname_txt.Clear();
m_txt.Clear();
dateTimePicker1.Value = DateTime.Now;
search();
}
}
private void search() {
listBox1.Items.Clear();
listBox2.Items.Clear();
listBox3.Items.Clear();
listBox4.Items.Clear();
listBox5.Items.Clear();
con.Open();
command.CommandText = "select * from people";
command.Connection = con;
SqlDataReader dataSearch = command.ExecuteReader();
if(dataSearch.HasRows){
while (dataSearch.Read())
{
listBox1.Items.Add(dataSearch["id"].ToString());
listBox2.Items.Add(dataSearch["fname"].ToString());
listBox3.Items.Add(dataSearch["lname"].ToString());
listBox4.Items.Add(dataSearch["mobile"].ToString());
listBox5.Items.Add(dataSearch["TDATE"].ToString());
}
}
con.Close();
}
private void btn_view_Click(object sender, EventArgs e)
{
search();
}
private void bn_update_Click(object sender, EventArgs e)
{
if (id_Txt.Text != "" & f_txt.Text != "" & Lname_txt.Text != "" & m_txt.Text != "" & dateTimePicker1.Text != "")
{
command.Connection = con;
con.Open();
command.CommandText = "update people set fname='" + f_txt.Text + "',lname='" + Lname_txt.Text + "',mobile='" + m_txt.Text + "',TDATE='" + dateTimePicker1.Text + "' where id='" +id_Txt.Text + "'";
command.ExecuteNonQuery();
con.Close();
MessageBox.Show("Data updated Successfully");
id_Txt.Clear();
f_txt.Clear();
Lname_txt.Clear();
m_txt.Clear();
dateTimePicker1.Value = DateTime.Now;
search();
}
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
ListBox list = sender as ListBox;
if(list.SelectedIndex!=-1)
{
listBox1.SelectedIndex = list.SelectedIndex;
listBox2.SelectedIndex = list.SelectedIndex;
listBox3.SelectedIndex = list.SelectedIndex;
listBox4.SelectedIndex = list.SelectedIndex;
listBox5.SelectedIndex = list.SelectedIndex;
// retrive to TextBox of AllowDrop events;
/* id_Txt.Text = listBox1.SelectedIndex.ToString();
f_txt.Text = listBox2.SelectedIndex.ToString();
Lname_txt.Text = listBox3.SelectedIndex.ToString();
m_txt.Text = listBox4.SelectedIndex.ToString();
dateTimePicker1.Value = DateTime.Now;*/
id_Txt.Text = listBox1.SelectedItem.ToString();
f_txt.Text = listBox2.SelectedItem.ToString();
Lname_txt.Text = listBox3.SelectedItem.ToString();
m_txt.Text = listBox4.SelectedItem.ToString();
dateTimePicker1.Value = DateTime.Now;
}
}
private void btn_delete_Click(object sender, EventArgs e)
{
if (id_Txt.Text != "")
{
command.Connection = con;
con.Open();
command.CommandText = "delete from people where id='" + id_Txt.Text + "'";
command.ExecuteNonQuery();
con.Close();
MessageBox.Show("Data deleted Successfully");
id_Txt.Clear();
f_txt.Clear();
Lname_txt.Clear();
m_txt.Clear();
dateTimePicker1.Value = DateTime.Now;
search();
}
}
private void label1_Click(object sender, EventArgs e) {}
private void button1_Click(object sender, EventArgs e) {}
private void button2_Click(object sender, EventArgs e)
{
if (text_search.Text == "")
{
MessageBox.Show("Enter the Rollno.");
}
else {
}
}
}
}