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ASP.NET Gridview not outputting all data for a specific query

They're must be a minor error somewhere in my code that im not seeing as to why on my web page , the gridview only outputs one row when i know the query works/
Both rows from management studio
Only one row in ASP page
heres my c#
string AdminID = Request.QueryString["ID"];
string AdminsCurrentLocation = Request.QueryString["Location"];
//retrieve admin location
try
{
string connectionString = "Data Source=SQL5027.HostBuddy.com;Initial Catalog=DB_A05369_WATERQ;User Id=DB_A05369_WATERQ_admin;Password=waterqws1";
//
// Create new SqlConnection object.
//
using (SqlConnection connection5 = new SqlConnection(connectionString))
{
connection5.Open();
using (SqlCommand command = new SqlCommand("SELECT * FROM [DB_A05369_WATERQ].[dbo].[S_CONTROL] WHERE LOGIN = '" + AdminID + "'", connection5))
{
//
// Invoke ExecuteReader method.
//
using (SqlDataReader reader2 = command.ExecuteReader())
{
reader2.Read();
TempLocationIdbox.Text = (reader2["ALL_LOCATION_ACCESS"].ToString());
}
}
connection5.Close();
}
}
catch (Exception ex) { }
if(TempLocationIdbox.Text == "Y")
{
string strSQLconnection = "Data Source=SQL5027.HostBuddy.com;Initial Catalog=DB_A05369_WATERQ;User Id=DB_A05369_WATERQ_admin;Password=waterqws1";
SqlConnection sqlConnection = new SqlConnection(strSQLconnection);
SqlCommand sqlCommand = new SqlCommand("SELECT DISTINCT ACT.ROW_ID , ACT.CREATED , MEM.FIRST_NAME , MEM.LAST_NAME , LOC.NAME , CAT.NAME , SER.NAME , EMP.FIRST_NAME , EMP.LAST_NAME , SER.DURATION , ACT.CASH , COS.NAME , ACT.COMMENTS FROM " +
"S_ACTIVITY ACT, S_LOCATION LOC, S_CATEGORY CAT, S_EMPLOYEE EMP, S_SERVICE SER, S_COST_CODE COS, S_MEMBER MEM " +
"WHERE ACT.EMPLOYEE_ID = EMP.ROW_ID AND ACT.SERVICE_ID = SER.ROW_ID AND ACT.CATEGORY_ID = CAT.ROW_ID AND ACT.COST_CODE_ID = COS.ROW_ID AND ACT.LOCATION_ID = LOC.ROW_ID AND ACT.MEMBER_ID = MEM.ROW_ID", sqlConnection);
sqlConnection.Open();
SqlDataReader reader = sqlCommand.ExecuteReader();
//collect rowID
string retrievedROWID = "";
if (reader.HasRows)
{
reader.Read();
string temp1 = reader["ROW_ID"].ToString();
retrievedROWID = temp1;
GridView1.DataSource = reader;
GridView1.DataBind();
}
sqlConnection.Close();
}
else if (TempLocationIdbox.Text == "N")
{
string strSQLconnection1 = "Data Source=SQL5027.HostBuddy.com;Initial Catalog=DB_A05369_WATERQ;User Id=DB_A05369_WATERQ_admin;Password=waterqws1";
SqlConnection sqlConnection1 = new SqlConnection(strSQLconnection1);
SqlCommand sqlCommand1 = new SqlCommand("SELECT * FROM S_LOCATION WHERE NAME = '" + AdminsCurrentLocation + "'", sqlConnection1);
sqlConnection1.Open();
string locationrowID = "";
SqlDataReader reader12 = sqlCommand1.ExecuteReader();
if (reader12.HasRows)
{
reader12.Read();
locationrowID = reader12["ROW_ID"].ToString();
}
sqlConnection1.Close();
string strSQLconnection = "Data Source=SQL5027.HostBuddy.com;Initial Catalog=DB_A05369_WATERQ;User Id=DB_A05369_WATERQ_admin;Password=waterqws1";
SqlConnection sqlConnection = new SqlConnection(strSQLconnection);
SqlCommand sqlCommand = new SqlCommand("SELECT DISTINCT ACT.ROW_ID , ACT.CREATED , MEM.FIRST_NAME , MEM.LAST_NAME , LOC.NAME , CAT.NAME , SER.NAME , EMP.FIRST_NAME , EMP.LAST_NAME , SER.DURATION , ACT.CASH , COS.NAME , ACT.COMMENTS FROM "+
"S_ACTIVITY ACT, S_LOCATION LOC, S_CATEGORY CAT, S_EMPLOYEE EMP, S_SERVICE SER, S_COST_CODE COS, S_MEMBER MEM "+
"WHERE ACT.EMPLOYEE_ID = EMP.ROW_ID AND ACT.SERVICE_ID = SER.ROW_ID AND ACT.CATEGORY_ID = CAT.ROW_ID AND ACT.COST_CODE_ID = COS.ROW_ID AND "+
"ACT.LOCATION_ID = '"+ locationrowID + "' AND ACT.MEMBER_ID = MEM.ROW_ID AND LOC.NAME = '"+ AdminsCurrentLocation + "'", sqlConnection);
sqlConnection.Open();
SqlDataReader reader = sqlCommand.ExecuteReader();
//collect rowID
string retrievedROWID = "";
if (reader.HasRows)
{
reader.Read();
string temp1 = reader["ROW_ID"].ToString();
retrievedROWID = temp1;
GridView1.DataSource = reader;
GridView1.DataBind();
}
sqlConnection.Close();
}
What stumps me is that my other query is working fine for the case where TempLocationIdbox.Text == "Y"...
Thanks , any help would be much appreciated.

Instead of using if (reader.HasRows) you need to use while (reader.Read()).Also created some kind of collection for example List<T> and populate it with results inside the while loop.Then outside the loop set the DataSource of the GridView control to point to List<T>.Here's a complete example:
public class Activity
{
public int RowID { get; set; }
public DateTime Created { get; set; }
public string FirstName { get; set; }
}
public partial class UsingSqlDataReader : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if(!Page.IsPostBack)
{
this.GetData();
}
}
private void GetData()
{
string cs = ConfigurationManager.ConnectionStrings["connectionString"].ConnectionString;
var activities = new List<Activity>();
using (var con = new SqlConnection(cs))
{
using(var cmd = new SqlCommand("SELECT ACT.ROW_ID,ACT.CREATED,ACT.FIRST_NAME FROM [dbo].[S_ACTIVITY] ACT", con))
{
cmd.CommandType = System.Data.CommandType.Text;
con.Open();
using (SqlDataReader reader = cmd.ExecuteReader())
{
while (reader.Read())
{
var activity = new Activity();
activity.RowID = Convert.ToInt32(reader["ROW_ID"]);
activity.Created = DateTime.Parse(reader["CREATED"].ToString());
activity.FirstName = Convert.ToString(reader["FIRST_NAME"]);
activities.Add(activity);
}
}
}
}
GridView1.DataSource = activities;
GridView1.DataBind();
}
}
Output:

A better solution would be to put your in-line query in a stored proc and execute the stored proc.
You could also bring it in a dataset and bind the gridview with that. but that is completely your choice.
In-line queries are very error prone and results could be unpredictable hence refrain using that.

C# MySQL Select all entries in table

My code selects only first entry, but I'm need to select all entries in a table. Is there any way to do it? Thanks!
public string getSiteForRotator()
{
string CommandText = "SELECT `url`, `desc`, `timer` FROM sites";
string Connect = "connection_string";
MySqlConnection myConnection = new MySqlConnection(Connect);
MySqlCommand myCommand = new MySqlCommand(CommandText, myConnection);
myConnection.Open();
MySqlDataReader MyDataReader;
MyDataReader = myCommand.ExecuteReader();
while (MyDataReader.Read())
{
string url = MyDataReader.GetString(0);
string desc = MyDataReader.GetString(1);
int timer = MyDataReader.GetInt32(2);
return url+"," + desc+"," + timer.ToString();
}
MyDataReader.Close();
myConnection.Close();
return "ERROR";
}

As it is now your code return just the first record because in the while loop you exit the method at the first loop with the return that concatenates together the data from the first record. If you want to return all record then
the most simple way, is to use a DataTable
public DataTable getSiteForRotator()
{
DataTable result = new DataTable();
string CommandText = "SELECT `url`, `desc`, `timer` FROM sites";
string Connect = "connection_string";
using(MySqlConnection myConnection = new MySqlConnection(Connect))
using(MySqlDataAdapter da = new MySqlDataAdapter(CommandText))
da.Fill(dt);
return dt;
}
and in your calling code you could check if there are rows in the table and use that rows if there is any of them
DataTable result = getSiteForRotator();
if(result.Rows.Count == 0)
Console.WriteLine("No rows found");
else
... use the rows of the datatable ....

public string getSiteForRotator()
{
string CommandText = "SELECT `url`, `desc`, `timer` FROM sites";
string Connect = "connection_string";
MySqlConnection myConnection = new MySqlConnection(Connect);
MySqlCommand myCommand = new MySqlCommand(CommandText, myConnection);
myConnection.Open();
MySqlDataReader MyDataReader;
MyDataReader = myCommand.ExecuteReader();
string url = "";
while (MyDataReader.Read())
{
url = MyDataReader.GetString(0);
string desc = MyDataReader.GetString(1);
int timer = MyDataReader.GetInt32(2);
url+"," + desc+"," + timer.ToString();
}
MyDataReader.Close();
myConnection.Close();
return url;
}
Is This Helpfull ?? You use return statement in while loop, thats y it only shows single record.

How to display sql query results into textbox on c#?

I'm currently making a voting app on C# Windows Form.
So I made a SQL query to count how many people voted for a specific candidate that will be displayed on textBox4
private void button1_Click(object sender, EventArgs e)
{
string idcan = textBox3.Text;
string score = textBox4.Text;
Connection con = new Connection();
SqlConnection sqlcon = con.Sambung();
sqlcon.Open();
string cek = "select count (ID_Candidate) as Score from DataVote where ID_Candidate = #idcan";
using (sqlcon)
{
SqlCommand com = new SqlCommand(cek, sqlcon);
com.Parameters.Add("idcan", SqlDbType.VarChar, 5).Value = score;
}
try
{
sqlcon.Open();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
How to display the results of the above SQL query to textBox4?

private void button1_Click(object sender, EventArgs e)
{
string idcan = textBox3.Text;
string score = textBox4.Text;
Connection con = new Connection();
SqlConnection sqlcon = con.Sambung();
sqlcon.Open();
string cek = "select count (ID_Candidate) as Score from DataVote where ID_Candidate = #idcan";
using (sqlcon)
{
SqlCommand com = new SqlCommand(cek, sqlcon);
com.Parameters.Add("idcan", SqlDbType.VarChar, 5).Value = score;
}
try
{
sqlcon.Open();
textBox4.Text=Convert.ToString(com.ExecuteScalar());
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}

You can actually do this code:
private void button1_Click(object sender, EventArgs e)
{
string idcan = textBox3.Text;
string score = textBox4.Text;
Datatable dt = new DataTable();
Connection con = new Connection();
SqlConnection sqlcon = con.Sambung();
SqlCommand com ;
sqlcon.Open();
string cek = "select count (ID_Candidate) as Score from DataVote where ID_Candidate = #idcan";
using(sqlcon)
{
using(com = new SqlCommand(cek, sqlcon))
{
sqlcon.Open();
com.Parameter.Add("#idcan",score );
SqlDataAdapter da = new SqlDataAdapter(com);
da.File(dt);
if(dt.Rows.Count > 0)
{
textBox4.Text = dt.Rows[0]["Score"].ToString();
}
}
}
}

Since your SELECT statement returns one row with one column, you can use ExecuteScalar to get it.
textBox4.Text = com.ExecuteScalar().ToString();
And your code needs a little bit refactoring like;
using(SqlConnection sqlcon = con.Sambung())
using(SqlCommand com = sqlcon.CreateCommand())
{
com.CommandText = "select count (ID_Candidate) as Score from DataVote where ID_Candidate = #idcan";
com.Parameters.Add("#idcan", SqlDbType.VarChar, 5).Value = score;
sqlcon.Open();
textBox4.Text = com.ExecuteScalar().ToString();
}
By the way, I strongly suspect your ID_Candidate column should be some numeric type instead of VarChar based on it's name.

Expand your question: If your query return as a table (many columns, many rows), you can use this code below. Similar for case return single value.
//Create class to store result value
public class ClassName
{
public string Col1 { get; set; }
public int Col2 { get; set; }
}
// In query code
ClassName[] allRecords = null;
SqlCommand command = ...; // your code
using (var reader = command.ExecuteReader())
{
var list = new List<ClassName>();
while (reader.Read())
list.Add(new ClassName {Col1 = reader.GetString(0), Col2 = reader.GetInt32(1)});
allRecords = list.ToArray();
}

how can I store all of the database records from a username(from registration) but it is based on the user input?

Here is my log in page code. What I want to do is when the user inputs his/her username, it will then get all of the database records "based on that username input" of the customer and store it in a single session.
protected void btn_Login_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source = 'PAULO'; Initial Catalog=ShoppingCartDB;Integrated Security =True");
conn.Open();
string checkuser = "select count(*) from UserData where Username = '" + txtUser.Text + "'";
SqlCommand scm = new SqlCommand(checkuser, conn);
int temp = Convert.ToInt32(scm.ExecuteScalar().ToString());
conn.Close();
if (temp == 1)
{
conn.Open();
string checkPassword = "select Password from UserData where Username ='" + txtUser.Text + "'";
SqlCommand passCom = new SqlCommand(checkPassword, conn);
string password = passCom.ExecuteScalar().ToString().Replace(" ", "");
if (password == txtPassword.Text)
{
Session["Username"] = txtUser.Text;
Response.Write("<script>alert('Record saved successfully')</script>");
Response.Redirect("OrderNow.aspx");
}
else
{
lblcrederror.Text = ("Credentials dont match");
}
}
else
{
lblcrederror.Text = ("Credentials dont match");
}
}
I have set the Session["Username"] to the user input(txtUser.text), but what I want to do is to get all of the database records on that username that the customer will enter.
Afterwards, I am planning to call on that specific database record and bind it to the order .aspx page. I have tried this code below but its only showing me the Session["Username"], since I have called it on the login page.
txtCustomerName.Text = Session["Username"].ToString();
txtCustomerPhoneNo.Text = Session["Contact"].ToString();
txtCustomerEmailID.Text = Session["Email"].ToString();
txtCustomerAddress.Text = Session["DeliveryAddress"].ToString();

You can create a data structure to store the information you need.
public class Person
{
public string Username { get; set; }
public string Contact { get; set; }
public string Email { get; set; }
public string Password { get; set; }
}
using (SqlCommand command = new SqlCommand(
"SELECT * FROM databaseTablename where username = " + txtUser.Text, conn))
{
using (SqlDataReader reader = command.ExecuteReader())
{
if (reader.HasRows)
{
while (reader.Read())
{
Person person = new Person();
person.Username = reader.GetString(reader.GetOrdinal("username"));
person.Contact = reader.GetString(reader.GetOrdinal("contact"));
person.Email = reader.GetString(reader.GetOrdinal("email"));
person.Password = reader.GetString(reader.GetOrdinal("password"));
}
}
}
}
You can then store this object in a session like so:
Session["username"] = person;
Later on, if you want to access the contents of the session, say in the Order.aspx page, you can do like so:
Person person = (Person)Session["username"];

get the records from the database. Store it in a comma separated string.
SqlConnection conn = new SqlConnection("Data Source = 'PAULO'; Initial Catalog=ShoppingCartDB;Integrated Security =True");
conn.Open();
string checkuser = "select count(*) from UserData where Username = '" + txtUser.Text + "'";
SqlCommand scm = new SqlCommand(checkuser, conn);
SqlDataAdapter da=new SqlDataAdapter(scm);
DataSet ds=new DataSet();
da.Fill(ds);
conn.Close();
string userdata="";
foreach (DataRow row in ds.Tables[0].Rows)
{
for (int i = 0; i < ds.Tables[0].Columns.Count; i++)
{
userdata+=","+row[i].ToString();
}
}
userdata=userdata.TrimStart(',');
Session["username"]= userdata;
for getting all the records just get this string from session and split it
If(Session["username"]!=null)
String user=Session["username"].ToString();
string[] udat=user.Split(',');
you can get all data in this string array.
Im kind of new to programming so please excuse any error.

This is for storing your all values in single session
DataBaseConnection db = new DataBaseConnection();
DataTable dt = new DataTable();
dt = db.executeNonQuery("Your Query that retrieves all user's data goes here");
if(dt.Rows.Count > 0)
{
List<string> lst = new List<string>();
foreach(DataRow dr in dt.Rows)
{
lst.Add(dr["Cloumn_1"].ToString());
lst.Add(dr["Column_2"].ToString());
.
.
Session["YourSessionName"] = lst;
}
}
here DataBaseConnection is class that returns connection string of database, so now you know what to do.
i hope this helps. Let me know

How to retrieve data from a SQL Server database in C#?

I have a database table with 3 columns firstname, Lastname and age. In my C# Windows application I have 3 textboxes called textbox1... I made my connectivity to my SQL Server using this code:
SqlConnection con = new SqlConnection("Data Source = .;
Initial Catalog = domain;
Integrated Security = True");
con.Open();
SqlCommand cmd = new SqlCommand("Select * from tablename", con);
I'd like to get values from my database; if I give a value in textbox1 it has to match the values in the database and retrieve other details to the corresponding textboxes.
I tried this method but it's not working:
cmd.CommandText = "select * from tablename where firstname = '" + textBox1.Text + "' ";
How can I do it to retrieve all the other values to the textboxes?

public Person SomeMethod(string fName)
{
var con = ConfigurationManager.ConnectionStrings["Yourconnection"].ToString();
Person matchingPerson = new Person();
using (SqlConnection myConnection = new SqlConnection(con))
{
string oString = "Select * from Employees where FirstName=#fName";
SqlCommand oCmd = new SqlCommand(oString, myConnection);
oCmd.Parameters.AddWithValue("#Fname", fName);
myConnection.Open();
using (SqlDataReader oReader = oCmd.ExecuteReader())
{
while (oReader.Read())
{
matchingPerson.firstName = oReader["FirstName"].ToString();
matchingPerson.lastName = oReader["LastName"].ToString();
}
myConnection.Close();
}
}
return matchingPerson;
}
Few things to note here: I used a parametrized query, which makes your code safer. The way you are making the select statement with the "where x = "+ Textbox.Text +"" part opens you up to SQL injection.
I've changed this to:
"Select * from Employees where FirstName=#fName"
oCmd.Parameters.AddWithValue("#fname", fName);
So what this block of code is going to do is:
Execute an SQL statement against your database, to see if any there are any firstnames matching the one you provided.
If that is the case, that person will be stored in a Person object (see below in my answer for the class).
If there is no match, the properties of the Person object will be null.
Obviously I don't exactly know what you are trying to do, so there's a few things to pay attention to: When there are more then 1 persons with a matching name, only the last one will be saved and returned to you.
If you want to be able to store this data, you can add them to a List<Person> .
Person class to make it cleaner:
public class Person
{
public string firstName { get; set; }
public string lastName { get; set; }
}
Now to call the method:
Person x = SomeMethod("John");
You can then fill your textboxes with values coming from the Person object like so:
txtLastName.Text = x.LastName;

create a class called DbManager:
Class DbManager
{
SqlConnection connection;
SqlCommand command;
public DbManager()
{
connection = new SqlConnection();
connection.ConnectionString = #"Data Source=. \SQLEXPRESS;AttachDbFilename=|DataDirectory|DatabaseName.mdf;Integrated Security=True;User Instance=True";
command = new SqlCommand();
command.Connection = connection;
command.CommandType = CommandType.Text;
} // constructor
public bool GetUsersData(ref string lastname, ref string firstname, ref string age)
{
bool returnvalue = false;
try
{
command.CommandText = "select * from TableName where firstname=#firstname and lastname=#lastname";
command.Parameters.Add("firstname",SqlDbType.VarChar).Value = firstname;
command.Parameters.Add("lastname",SqlDbType.VarChar).Value = lastname;
connection.Open();
SqlDataReader reader= command.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
lastname = reader.GetString(1);
firstname = reader.GetString(2);
age = reader.GetString(3);
}
}
returnvalue = true;
}
catch
{ }
finally
{
connection.Close();
}
return returnvalue;
}
then double click the retrieve button(e.g btnretrieve) on your form and insert the following code:
private void btnretrieve_Click(object sender, EventArgs e)
{
try
{
string lastname = null;
string firstname = null;
string age = null;
DbManager db = new DbManager();
bool status = db.GetUsersData(ref surname, ref firstname, ref age);
if (status)
{
txtlastname.Text = surname;
txtfirstname.Text = firstname;
txtAge.Text = age;
}
}
catch
{
}
}

To retrieve data from database:
private SqlConnection Conn;
private void CreateConnection()
{
string ConnStr = ConfigurationManager.ConnectionStrings["ConnStr"].ConnectionString;
Conn = new SqlConnection(ConnStr);
}
public DataTable getData()
{
CreateConnection();
string SqlString = "SELECT * FROM TableName WHERE SomeID = #SomeID;";
SqlDataAdapter sda = new SqlDataAdapter(SqlString, Conn);
DataTable dt = new DataTable();
try
{
Conn.Open();
sda.Fill(dt);
}
catch (SqlException se)
{
throw;
}
catch (Exception ex)
{
throw;
}
finally
{
Conn.Close();
}
return dt;
}

You can use this simple method after setting up your connection:
private void getAgentInfo(string key)//"key" is your search paramter inside database
{
con.Open();
string sqlquery = "SELECT * FROM TableName WHERE firstname = #fName";
SqlCommand command = new SqlCommand(sqlquery, con);
SqlDataReader sReader;
command.Parameters.Clear();
command.Parameters.AddWithValue("#fName", key);
sReader = command.ExecuteReader();
while (sReader.Read())
{
textBoxLastName.Text = sReader["Lastname"].ToString(); //SqlDataReader
//["LastName"] the name of your column you want to retrieve from DB
textBoxAge.Text = sReader["age"].ToString();
//["age"] another column you want to retrieve
}
con.Close();
}
Now you can pass the key to this method by your textBoxFirstName like:
getAgentInfo(textBoxFirstName.Text);

we can use this type of snippet also we generally use this kind of code for testing and validating data for DB to API fields
class Db
{
private readonly static string ConnectionString =
ConfigurationManager.ConnectionStrings
["DbConnectionString"].ConnectionString;
public static List<string> GetValuesFromDB(string LocationCode)
{
List<string> ValuesFromDB = new List<string>();
string LocationqueryString = "select BELocationCode,CityLocation,CityLocationDescription,CountryCode,CountryDescription " +
$"from [CustomerLocations] where LocationCode='{LocationCode}';";
using (SqlConnection Locationconnection =
new SqlConnection(ConnectionString))
{
SqlCommand command = new SqlCommand(LocationqueryString, Locationconnection);
try
{
Locationconnection.Open();
SqlDataReader Locationreader = command.ExecuteReader();
while (Locationreader.Read())
{
for (int i = 0; i <= Locationreader.FieldCount - 1; i++)
{
ValuesFromDB.Add(Locationreader[i].ToString());
}
}
Locationreader.Close();
return ValuesFromDB;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
throw;
}
}
}
}
hope this might helpful
Note: you guys need connection string (in our case
"DbConnectionString")

DataTable formerSlidesData = new DataTable();
DformerSlidesData = searchAndFilterService.SearchSlideById(ids[i]);
if (formerSlidesData.Rows.Count > 0)
{
DataRow rowa = formerSlidesData.Rows[0];
cabinet = Convert.ToInt32(rowa["cabinet"]);
box = Convert.ToInt32(rowa["box"]);
drawer = Convert.ToInt32(rowa["drawer"]);
}