I am trying to have the item selected from the combo box (Site PSI) auto-populate all the textboxes to the right. I have scoured the web and there is some data source selections and auotocomplete sections but they are not working. I have tried several steps that were resolved with a similar issue on this website but it is not working. Here is my code. the combobox is called cmbSitePSI and the text boxes txtSiteName, txtSiteLName, etc...I was able to autopopulate them from a grid but I am not using a grid. Please help, thank you so much in advance.
con.Open();
SqlDataAdapter da = new SqlDataAdapter(#"Select * from Site order by SitePSI", con);
DataTable dt = new DataTable();
da.Fill(dt);
SqlCommand cmd = new SqlCommand("Select SiteName, SiteLongName, SiteAddress1, SiteAddress2, SiteAddress3, SiteCity, SiteState, SiteZipCode, SiteCountry, " +
"SiteOperationsRegion from Site where SitePSI = '" + cmbSitePSI.Text + "'", con);
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("#SitePSI", int.Parse(cmbSitePSI.Text));
SqlDataReader dr = cmd.ExecuteReader();
dt1.Load(dr);
UPDATE
I have tried using this method but I have not been successful. I get squiggilies on these lines string sSiteName = r.GetString("SiteName");
private void CmbSitePSI_SelectedIndexChanged(object sender, EventArgs e)
{
con.Open();
SqlDataAdapter da2 = new SqlDataAdapter(#"Select * from Site where SitePSI = '" + cmbSitePSI + "'", con);
string constring = "Data Source=*********;Initial Catalog=DIETS;Integrated Security=True";
string Query = "Select * from Site where SitePSI = '" + cmbSitePSI.Text + "' ;";
SqlConnection condata = new SqlConnection(constring);
SqlCommand cmddata = new SqlCommand(Query, condata);
SqlDataReader r;
try
{
condata.Open();
r = cmddata.ExecuteReader();
while (r.Read())
{
string sSiteName = r.GetString("SiteName");
string sSiteLongName = r.GetString("SiteLongName");
txtSiteName.Text = sSiteName;
txtSiteLName.Text = sSiteLongName;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
Related
I have a problem , i'm trying to do operations between values recorded(type float) in table of data , the problem is when i try to update value(result of the operation in textbox) in datable using combobox after maintaining opération , it shows me error (System.Data.SqlClient.SqlException: 'Error converting data type varchar to float.'), So how can i resolve that !help please
This is a part a of my code in which the error exists
private void comboBox5_SelectedIndexChanged(object sender, EventArgs e)
{
con.Open();
String query = "UPDATE Table_com SET Contents='" + textBox6.Text + "' WHERE Variable='" + comboBox5.Text + "'";
SqlDataAdapter SDA = new SqlDataAdapter(query, con);
SDA.SelectCommand.ExecuteNonQuery();
SqlCommand cmd = con.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "select * from Table_com where Variable='" + comboBox5.SelectedItem.ToString() + "'";
cmd.ExecuteNonQuery();
DataTable dt = new DataTable();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dt);
con.Close();
MessageBox.Show("Variable mise à jour avec succés");
}
You cannot use float integer etc. values like text field as:
String query = "UPDATE Table_com SET Contents='" + textBox6.Text + "' WHERE Variable='" + comboBox5.Text + "'";
and your code really risky, you may use parameters like this, dont use string and convert your value to float :
static void Main(string[] args)
{
var ConnectionString = "YOUR CONNECTION STRING";
DataTable dt = new DataTable();
using (SqlConnection con = new SqlConnection(ConnectionString))
{
String query = "UPDATE Table_com SET Contents=#contents WHERE Variable=#variable";
using (SqlCommand cmd = new SqlCommand(query, con))
{
cmd.CommandType = System.Data.CommandType.Text;
cmd.Parameters.Add("#contents", SqlDbType.Float).Value = Convert.ToDouble(textBox6.Text);
cmd.Parameters.Add("#variable", SqlDbType.NVarChar).Value = comboBox5.Text;
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
da.Fill(dt);
}
}
}
}
this is what i tried refering to wikiCan answer
SqlConnection con = new SqlConnection(#"Data Source=DESKTOP-VEFPLGG\SQLEXPRESS;Initial Catalog=test;Integrated Security=True");
private void comboBox5_SelectedIndexChanged(object sender, EventArgs e)
{
DataTable dt = new DataTable();
String query = "UPDATE Table_com SET Contents=#contents ";
using (SqlCommand cmd = new SqlCommand(query, con))
{
cmd.CommandType = System.Data.CommandType.Text;
cmd.Parameters.Add("#contents", SqlDbType.Float).Value = textBox6.Text;
//cmd.Parameters.Add("#variable", SqlDbType.Float).Value = Convert.ToDouble(comboBox5.Text);
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
da.Fill(dt);
}
}
}
how can i search data by chekced multiple checkedlistbox when clicking search..?
How can I accomplish filtering data by multiple checkedlistboxes when clicking search?
For example I want to search data that has penyakit = 'Penyakit B' and placeholder = '07'. So when I click search, it should show one row that matches both of these conditions
Here is what I have so far:
MySqlConnection con = new MySqlConnection(MyConnectionString);
con.Open();
try
{
MySqlCommand cmd = con.CreateCommand();
foreach (object itemChecked in chkboxPenyakit.CheckedItems)
{
cmd.CommandText = "Select * FROM tb_pasien where Penyakit = '" + itemChecked.ToString() + "'";
}
MySqlDataAdapter adap = new MySqlDataAdapter(cmd);
DataSet ds = new DataSet();
adap.Fill(ds);
dgvData.DataSource = ds.Tables[0].DefaultView;
}
catch (Exception)
{
throw;
}
finally
{
if (con.State == ConnectionState.Open)
{
con.Clone();
}
}
I am trying to retrieve data from a Database and show them on a form; but my code isn't working... I've got no errors, and logically it seems to work (to me) so I cannot figure out where I have gone wrong. That's where I need your help!
private void tableListBox_SelectedIndexChanged(object sender, EventArgs e)
{
string constring = #"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\IncomerDefault.mdf;Integrated Security=True;Connect Timeout=30";
string Query = "SELECT * FROM [Table] WHERE Default_Name = '" + tableListBox.SelectedValue + "'";
SqlConnection con = new SqlConnection(constring);
SqlCommand cmd = new SqlCommand(Query, con);
SqlDataReader Reader;
try
{
con.Open();
Reader = cmd.ExecuteReader();
while (Reader.Read())
{
textBox1.Text = Reader.GetValue(2).ToString();
comboBox1.Text = Reader.GetValue(3).ToString();
comboBox3.Text = Reader.GetValue(4).ToString();
textBox2.Text = Reader.GetValue(6).ToString();
comboBox2.Text = Reader.GetValue(7).ToString();
comboBox4.Text = Reader.GetValue(8).ToString();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
con.Close();
}
The 'tableListBox' is populated with all the values in column 'Default_Name'. I want it so that when the 'Default_Name' is selected from the list box it shows the values, in textboxes and comboboxes, that correspond with that row in the Database.
Any and all help would be appreciated. Thanks.
I'm going to start by changing your design a bit and suggest that perhaps you look at using a datatable and then just retrieving the rows from the datatable.
private void tableListBox_SelectedIndexChanged(object sender, EventArgs e)
{
private DataTable dataTable;
string constring = #"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\IncomerDefault.mdf;Integrated Security=True;Connect Timeout=30";
string Query = "SELECT * FROM [Table] WHERE Default_Name = '" + tableListBox.SelectedValue + "'";
SqlConnection con = new SqlConnection(constring);
SqlCommand cmd = new SqlCommand(Query, con);
try
{
con.Open();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(dataTable);
foreach(DataRow row in dataTable.Rows)
{
textBox1.Text = row[2].ToString();
comboBox1.Text = row[3].ToString();
comboBox3.Text = row[4].ToString();
textBox2.Text = row[6].ToString();
comboBox2.Text = row[7].ToString();
comboBox4.Text = row[8].ToString();
}
da.Dispose();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
con.Close();
}
I generally find that DataTables are more reliable than looping through the actual reader. Ofcourse this assumes that there is data being returned. Also try changing your select statement to this
string Query = "SELECT * FROM [Table]"
If that works, then the problem could be
There is no default name of the specified value or
tableListBox.SelectedValue is not returning any value, in which case, have a look at your listbox selected value
Thanks to Takarii for helping. I figured out who to make it work.
private void tableListBox_SelectedValueChanged(object sender, EventArgs e)
{
string constring = #"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\IncomerDefault.mdf;Integrated Security=True;Connect Timeout=30";
string Query = "SELECT * FROM [Table] WHERE ID = '" + tableListBox.SelectedIndex.ToString() + "'";
SqlConnection con = new SqlConnection(constring);
SqlCommand cmd = new SqlCommand(Query, con);
SqlDataReader Reader;
try
{
con.Open();
Reader = cmd.ExecuteReader();
while (Reader.Read())
{
textBox1.Text = Reader.GetValue(2).ToString();
comboBox1.Text = Reader.GetValue(3).ToString();
comboBox3.Text = Reader.GetValue(4).ToString();
textBox2.Text = Reader.GetValue(6).ToString();
comboBox2.Text = Reader.GetValue(7).ToString();
comboBox4.Text = Reader.GetValue(8).ToString();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
con.Close();
}
First I changed the void to 'SelectedValueChanged' and then I changed the 'WHERE' in the connection Query to the Row Index associated with the selected Value.
Thanks for everyone's help!
Can anybody tell me why my database isn't updating? Here's my code:
protected void editSection_selected(object sender, EventArgs e) {
int index = grdPhone.SelectedIndex;
GridViewRow row = grdPhone.Rows[index+1];
string values = ((DropDownList)sender).SelectedValue;
int tempVal = Convert.ToInt32(values);
int caseage = Convert.ToInt32(keyId);
int value = tempVal;
/*OleDbConnection con = new OleDbConnection(strConnstring);
//string query = "Update Categories set HRS_LEVEL_AMOUNT=" + tempVal + " where parent_id=65 and ID=" + caseage;
string query = "Delete HRS_LEVEL_AMOUNT from Categories where parent_id=65 and id=" + caseage;
OleDbCommand cmd = new OleDbCommand(query, con);
con.Open();
cmd.ExecuteNonQuery();
con.Dispose();
cmd.Dispose();
con.Close();
accPhoneNumbers.UpdateCommand = "Update Categories set HRS_LEVEL_AMOUNT=" + tempVal + " where parent_id=65 and ID=" + caseage;
*/
string str = "UPDATE Categories SET HRS_LEVEL_AMOUNT = ? WHERE ID=?";
using (OleDbConnection con = new OleDbConnection(strConnstring))
{
using (OleDbCommand cmd = new OleDbCommand(str, con))
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("HRS_LEVEL_AMOUNT", tempVal);
cmd.Parameters.AddWithValue("ID", caseage);
con.Open();
cmd.ExecuteNonQuery();
}
}
Label1.Text += " editSection Success! (B) " + tempVal;
}
The commented part is my first solution (including the accPhoneNumbers.UpdateCommand).
I really need your help guys.
I hope this can help you:
string str = "UPDATE Categories SET HRS_LEVEL_AMOUNT = #value1 WHERE ID=#value2";
using (OleDbConnection con = new OleDbConnection(strConnstring))
{
using (OleDbCommand cmd = new OleDbCommand(str, con))
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("#value1", tempVal);
cmd.Parameters.AddWithValue("#value2", caseage);
con.Open();
cmd.ExecuteNonQuery();
con.close();
}
}
For more information you can visit this video
I need to be able to verify a username and password against a sql server and I need code for a C# forms application.
I have it setup with 2 textboxes (1 user and 1 pass) and then I have a login button.
SqlConnection UGIcon = new SqlConnection();
UGIcon.ConnectionString = "Data Source=HP-PC//localhost;Initial Catalog=UGI;Integrated Security=True";
UGIcon.Open();
string userText = textBox11.Text;
string passText = textBox12.Text;
SqlCommand cmd = new SqlCommand("SELECT stUsername,stPassword FROM LoginDetails WHERE stUsername='" + textBox11.Text + "' and stPassword='" + textBox12.Text + "'", UGIcon);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
if ( dt.Rows.Count > 0)
{
MessageBox.Show("Login Success!!");
cmd = new SqlCommand("SELECT stRole from LoginDetails where stUsername=#stUsername", UGIcon);
cmd.Parameters.AddWithValue("#stUsername",userText);
string role = cmd.ExecuteScalar().ToString();
MessageBox.Show(role);
UGIcon.Close();
}
else
{
MessageBox.Show("Access Denied!!");
UGIcon.Close();
}
I'm a real believer in using the "using" statements. You can also save yourself a 2nd query by asking for the stRole variable in the original query. The using blocks will automatically dispose of the objects, so when execution leaves this area, the objects will automatically be cleaned up.
using (SqlConnection UGIcon = new SqlConnection("Data Source=localhost\\sqlexpress;Initial Catalog=UGI;Integrated Security=True"))
{
UGIcon.Open();
string userText = textBox11.Text;
string passText = textBox12.Text;
SqlCommand cmd = new SqlCommand("SELECT stUsername,stPassword, stRole FROM LoginDetails WHERE stUsername='" + userText + "' and stPassword='" + passText + "'", UGIcon);
using (SqlDataReader rdr = cmd.ExecuteReader())
{
if (rdr.HasRows)
{
while (rdr.Read())
{
string role = rdr["stRole"].ToString();
MessageBox.Show(role);
}
}
else
{
MessageBox.Show("Access Denied!!");
}
}
}
Pls check this code
SqlConnection thisConnection = new
SqlConnection(#"Server=(local)\sqlexpress;Integrated Security=True;" +
"Database=northwind");
thisConnection.Open();
SqlCommand thisCommand = thisConnection.CreateCommand();
thisCommand.CommandText = "Select count(*) from UserDetails
WHere UserName = "+txtUsername.text.trim().toLower() + " and Password = " +txtPassword.text.trim().toLower();
Object countResult = thisCommand.ExecuteScalar();
Console.WriteLine("Count of Customers = {0}", countResult);
thisConnection.Close();