Develop Reference

How to enter more than 1 row into dataGridView from textBox search

I am using the below code to search for the inputted textBox ID in an accessdb and returning the row of data to a dataGridView. When I search for a second ID, the first row in the GridView is replaced, How can I make it save multiple rows?
The end goal of this project is to allow the user to search as many ID's as they like and pull the corresponding row of data into the gridview to then save all into a csv.
private void searchButton_Click(object sender, EventArgs e)
{
conn1.Open();
//return ID, IMEI, ICCID, IMSI from dataBase
OleDbCommand cmd1 = new OleDbCommand("Select ID, IMEI,ICCID, IMSI from TBL where ID=#param1", conn1);
cmd1.Parameters.AddWithValue("#param1", txtScannedValue.Text);
OleDbDataReader reader1;
reader1 = cmd1.ExecuteReader();
DataTable dt = new DataTable();
dt.Load(reader1);
//dataGridView1.DataSource= dt;
if (dt.Rows.Count > 0)
{
((DataTable)dataGridView1.DataSource).ImportRow(dt.Rows[0]);
}
else
{
MessageBox.Show("No Data Found");
}
//reset textBox
txtScannedValue.Text = "";
conn1.Close();
}

What you are doing is - each time you press the searchButton_Click button you are running a query that returns 1 row only(ID=#param1) and then you are inserting ALL(which is always 1 in your case due to query) your searched rows to your dataGridView via .DataSource() bind.
To solve this I would recommend you to re-implement your data bindings:
I am assuming that DataTable is from ADO.NET so without changing a query you could bind your data something like this:
// this is pseudocode
private void searchButton_Click(object sender, EventArgs e) {
var row = (DataGridViewRow) dataGridView1.Rows[0].Clone();
var retrievedRow = getRowById(txtScannedValue.Text);
if (retrievedRow is null) return;
row.Cells[0].Value = retrievedRow.value1; // bind here you model fields
row.Cells[1].Value = retrievedRow.value2;
// ...
dataGridView1.Rows.Add(row);
}
private void getRowById(string id) {
conn1.Open();
OleDbCommand cmd1 = new OleDbCommand("Select ID, IMEI, TekNum, BatchNum, ICCID, IMSI from TBLTest1 where ID=#param1", conn1);
cmd1.Parameters.AddWithValue("#param1", id);
OleDbDataReader reader1;
reader1 = cmd1.ExecuteReader();
DataTable dt = new DataTable();
dt.Load(reader1);
DataRow row;
if (dt.Rows.Count > 0) {
row = dt.Rows[0];
}
conn1.Close();
return row;
}

I'd use a ListBox or ComboBox to present data they can recognize with the id available. To append rows, use DataTable.ImportRow.
Here a ComboBox is used to present, in this case employees and the DataGridView is initially populated with an empty DataTable.
Click a button to get a row to append to the underlying DataTable for the DataGridView.
Model and data operations
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
namespace AccessApplication.Classes
{
public class EmployeesOperations
{
public static string ConnectionString =>
"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=NorthWind.accdb";
public static List<Employee> EmployeesList()
{
List<Employee> list = new List<Employee>();
using var cn = new OleDbConnection { ConnectionString = ConnectionString };
using var cmd = new OleDbCommand() { Connection = cn };
cmd.CommandText = "SELECT EmployeeID, FirstName, LastName FROM Employees";
cn.Open();
var reader = cmd.ExecuteReader();
while (reader.Read())
{
list.Add(new Employee()
{
Id = reader.GetInt32(0),
FirstName = reader.GetString(1),
LastName = reader.GetString(2)
});
}
return list;
}
public static DataTable EmptyDataTable()
{
using var cn = new OleDbConnection { ConnectionString = ConnectionString };
using var cmd = new OleDbCommand() { Connection = cn };
cmd.CommandText =
"SELECT TOP 1 EmployeeID, FirstName, LastName FROM Employees";
cn.Open();
DataTable table = new DataTable();
table.Load(cmd.ExecuteReader());
table.Rows.Clear();
return table;
}
public static DataTable SingleRow(int identifier)
{
using var cn = new OleDbConnection { ConnectionString = ConnectionString };
using var cmd = new OleDbCommand() { Connection = cn };
cmd.CommandText =
"SELECT TOP 1 EmployeeID, FirstName, LastName " +
"FROM Employees WHERE EmployeeID = #Id";
cmd.Parameters.Add("#Id", OleDbType.Integer).Value = identifier;
cn.Open();
DataTable table = new DataTable();
table.Load(cmd.ExecuteReader());
return table;
}
}
public class Employee
{
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public override string ToString() => $"{FirstName} {LastName}";
}
}
Form code
public partial class EmployeeForm : Form
{
private readonly BindingSource _employeesBindingSource =
new BindingSource();
public EmployeeForm()
{
InitializeComponent();
_employeesBindingSource.DataSource = EmployeesOperations.EmployeesList();
EmployeesComboBox.DataSource = _employeesBindingSource;
dataGridView1.DataSource = EmployeesOperations.EmptyDataTable();
}
private void GetSingleEmployeeButton_Click(object sender, EventArgs e)
{
int id = ((Employee)EmployeesComboBox.SelectedItem).Id;
DataTable table = ((DataTable)dataGridView1.DataSource);
DataRow result = table.AsEnumerable()
.FirstOrDefault(row => row.Field<int>("EmployeeID") == id);
// only add if not already in the data grid view
if (result == null)
{
table.ImportRow(EmployeesOperations.SingleRow(id).Rows[0]);
}
}
}

The below code is now working for using the textbox to search the database and enter multiple rows of code into the dataGridView. The question was answered in the comments on the op by JohnG. Posting here for future reference.
private void searchButton_Click(object sender, EventArgs e)
{
conn1.Open();
//return ID, IMEI, BatchNum, ICCID, IMSI from dataBase
OleDbCommand cmd1 = new OleDbCommand("Select ID, IMEI, BatchNum, ICCID, IMSI from TBLTest1 where ID=#param1", conn1);
cmd1.Parameters.AddWithValue("#param1", txtScannedValue.Text);
OleDbDataReader reader1;
reader1 = cmd1.ExecuteReader();
DataTable dt = new DataTable();
dt.Load(reader1);
if (dt.Rows.Count > 0)
{
if (dataGridView1.DataSource != null) {
((DataTable)dataGridView1.DataSource).ImportRow(dt.Rows[0]);
}
else
{
dataGridView1.DataSource = dt;
}
}
else
{
MessageBox.Show("No Data Found");
}
//reset textBox
txtScannedValue.Text = "";
conn1.Close();
}

Converting datatable to int directly in c#

I tried to convert a datatable that just has one field (the field's data is primary key) to int , in order to using in sql commands such as Select and etc.
but it fails!
and when i cast it to an object or convert it to string first , the commands gone wrong!
please help me
i want to select * from a table which has a foreign key where the foreign code equals by an int value that has been selected from a table in another sql command and returned as a datatable row with just one field.
here is my code :
class mydata :
public string strsql;
public DataTable showData()
{
SqlConnection Con1 = new SqlConnection("Data Source=.;database=daneshgah;integrated security=true");
Con1.Open();
SqlDataAdapter da = new SqlDataAdapter(strsql, Con1);
DataTable dt = new DataTable();
da.Fill(dt);
Con1.Close();
return (dt);
}
button event :
myData search = new myData();
int aa = int.Parse(txt_stdcourse.Text);
search.strsql = "select tchNo from University where couNo='" + aa + "'";
DataTable a = search.showData();
string b = a.Rows[0][0].ToString();
int c = int.Parse(b);
myData akhz = new myData();
akhz.strsql = "insert into stc (couNo,tchNo,stuNo)values('" + aa + "','" + c + "','" + id + "')";
akhz.Data();
lbl_stdcourseok.Visible = false;
lbl_stdcourseok.Visible = true;

Sounds like you need to use ExecuteScalar on a SqlCommand instead of using a DataAdapter. ExecuteScalar gives the first column of the first row of the dataset returned.
public object RunSQL(string sql)
{
SqlConnection Con1 = new SqlConnection("Data Source=.;database=daneshgah;integrated security=true");
Con1.Open();
SqlCommand command = new SqlCommand(strsql, Con1);
return command.ExecuteScalar();
}
//In some event handler
int myValue = (int)RunSQL("Select Value from Table where ID = " + ID);
That said, please don't do that - it is very bad practice. You almost certainly want to create a class that models whatever data objects you are dealing with, instead of executing arbitrary SQL from event handlers. It is also probably best to manage connections independently of your data class, in a separate data access layer.
An extremely rudimentary example:
public class Student
{
public int StudentID { get; set; }
public bool CurrentlyEnrolled { get; set; }
public string Name { get; set; }
public static Student LoadByID(int ID)
{
DataTable results = DAL.ExecuteSQL("Select * from Students WHERE StudentID = #StudentID", new SqlParameter("#StudentID", ID));
if (results.Rows.Count == 1)
{
return FillFromRow(results.Rows[0]);
}
else
{
throw new DataException("Could not find exactly one record with the specified ID.");
}
}
private static Student FillFromRow(DataRow row)
{
Student bob = new Student();
bob.CurrentlyEnrolled = (bool)row["CurrentlyEnrolled"];
bob.Name = (string)row["Name"];
bob.StudentID = (int)row["StudentID"];
return bob;
}
}
public static class DAL
{
private const string ConnectionString = "SomeConnectionString"; //Should really be stored in configuration files.
public static DataTable ExecuteSQL(string SQL, params SqlParameter[] parameters)
{
using (SqlConnection connection = new SqlConnection(ConnectionString))
{
using (SqlCommand command = new SqlCommand(SQL))
{
command.Parameters.AddRange(parameters);
using (SqlDataAdapter adapter = new SqlDataAdapter(command))
{
DataTable result = new DataTable();
adapter.Fill(result);
return result;
}
}
}
}
}

The connection is open

A few months ago I made a test program for a project and everything worked fine there.
Now I am working on the program itself, so I copied the code from the test program and
changed the the names of the columns,buttons etc. so it would fit the current program.
When I try to add something into the database it does nothing on the first click, on the
second pops up an error which says that the connection is open.. I really got no idea what's
the problem. I tried to check again if I made a mistake in a column name or the database name
but everything seems to be correct.
Note: I also have a function that show data from the database and it works without any problem.
private void InsertData()
{
string NewCode = GenerateCode();
string NewSentence = txtSentence.Text;
string NewRow = NewRowNum();
try
{
string AddData = "INSERT INTO ShopSentences (BinaryStrings,Sentence,RowNumber) VALUES (#NewBinaryString,#NewSentence,#NewRowNumber)";
SqlCommand DataAdd = new SqlCommand(AddData, Connection);
DataAdd.Parameters.AddWithValue("#NewBinaryString", NewCode);
DataAdd.Parameters.AddWithValue("#NewNewSentence", NewSentence);
DataAdd.Parameters.AddWithValue("#NewRowNumber", NewRow);
Connection.Open();
DataAdd.ExecuteNonQuery();
Connection.Close();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
//Checking the banary code in the last row
string GenerateCode()
{
string RowNo = RowFind();
int Row = int.Parse(RowNo);
int Code = Row + 1;
string Cd = Convert.ToString(Code, 2);
int Ln = Cd.Trim().Length;
if (Ln == 3)
{
Cd = "100" + Cd;
}
else if (Ln == 4)
{
Cd = "10" + Cd;
}
else if (Ln == 5)
{
Cd = "1" + Cd;
}
return Cd;
}
//Finding the last row
string RowFind()
{
Connection.Open();
string queryString = string.Format("SELECT * FROM ShopSentences");
SqlDataAdapter sda = new SqlDataAdapter(queryString, Connection);
DataTable dt = new DataTable("ShopSentences");
sda.Fill(dt);
Connection.Close();
return dt.Rows[dt.Rows.Count - 1]["RowNumber"].ToString();
}
string NewRowNum()
{
string Row = RowFind();
int CalcRow = int.Parse(Row) + 1;
Row = CalcRow.ToString();
return Row;
}
The connection that appears to be open is the one in the string RowFind().
Here are the other related things to the database:
public partial class frmShop : Form
{
System.Data.SqlClient.SqlConnection Connection;
public frmShop()
{
string DatabaseConnection = WindowsFormsApplication1.Properties.Settings.Default.BinaryStringsDictionaryConnectionString1;
Connection = new System.Data.SqlClient.SqlConnection();
Connection.ConnectionString = DatabaseConnection;
InitializeComponent();
}
private void frmShop_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'binaryStringsDictionaryDataSet.ShopSentences' table. You can move, or remove it, as needed.
this.shopSentencesTableAdapter.Fill(this.binaryStringsDictionaryDataSet.ShopSentences);
}
private void GetSentence()
{
try
{
Connection.Open();
SqlDataReader ReadSentence = null;
Int32 BinaryInt = Int32.Parse(txtBinaryString.Text);
string CommandString = "SELECT Sentence FROM ShopSentences WHERE BinaryStrings = #BinaryString";
SqlCommand Command = new SqlCommand(CommandString, Connection);
Command.Parameters.Add("#BinaryString", System.Data.SqlDbType.Int).Value = BinaryInt;
ReadSentence = Command.ExecuteReader();
while (ReadSentence.Read())
{
txtSentence.Text = (ReadSentence["Sentence"].ToString());
Fit = 1;
}
Connection.Close();
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
}

You are getting errors because you are reusing the same connection Connection.Open(); several times.
Your method InsertData() is doing this 3 times in the same method.
You should create a new instance of the connection object and dispose it on your methods.
Using Statement are the way to go.
private void InsertData()
{
using (var Connection = new SqlConnection(DatabaseConnection))
{
string NewCode = GenerateCode();
string NewSentence = txtSentence.Text;
string NewRow = NewRowNum();
try
{
Connection.Open();
string AddData = "INSERT INTO ShopSentences (BinaryStrings,Sentence,RowNumber) VALUES (#NewBinaryString,#NewSentence,#NewRowNumber)";
SqlCommand DataAdd = new SqlCommand(AddData, Connection);
DataAdd.Parameters.AddWithValue("#NewBinaryString", NewCode);
DataAdd.Parameters.AddWithValue("#NewNewSentence", NewSentence);
DataAdd.Parameters.AddWithValue("#NewRowNumber", NewRow);
DataAdd.ExecuteNonQuery();
//Connection.Close(); no need to close
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
}
You can save one more connection if you store the row returned by RowFind()
string RowFind()
{
using (var Connection = new SqlConnection(DatabaseConnection))
{
Connection.Open();
string queryString = string.Format("SELECT * FROM ShopSentences");
SqlDataAdapter sda = new SqlDataAdapter(queryString, Connection);
DataTable dt = new DataTable("ShopSentences");
sda.Fill(dt);
//Connection.Close();
return dt.Rows[dt.Rows.Count - 1]["RowNumber"].ToString();
}
}
So you would connect once instead of twice:
var Row = RowFind();
string NewCode = GenerateCode(Row);
string NewRow = NewRowNum(Row);
string NewSentence = txtSentence.Text;
Declare your connection string variable to a property so you can reuse it:
private string DatabaseConnection {get; set;}

Instead using an instance level SqlConnection you should only provide a common factory for creating a connection:
public partial class frmShop : Form
{
private string ConnectionString
{
get { return WindowsFormsApplication1.Properties.Settings.Default.BinaryStringsDictionaryConnectionString1; }
}
public frmShop()
{
InitializeComponent();
}
private SqlConnection CreateConnection()
{
var conn = new SqlConnection(ConnectionString);
conn.Open();
return conn;
}
private void frmShop_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'binaryStringsDictionaryDataSet.ShopSentences' table. You can move, or remove it, as needed.
this.shopSentencesTableAdapter.Fill(this.binaryStringsDictionaryDataSet.ShopSentences);
}
private void GetSentence()
{
try
{
using (var conn = CreateConnection())
{
var BinaryInt = int.Parse(txtBinaryString.Text);
var commandString = "SELECT Sentence FROM ShopSentences WHERE BinaryStrings = #BinaryString";
using (var Command = new SqlCommand(commandString, conn))
{
Command.Parameters.Add("#BinaryString", System.Data.SqlDbType.Int).Value = BinaryInt;
using (var readSentence = Command.ExecuteReader())
{
while (readSentence.Read())
{
txtSentence.Text = (readSentence["Sentence"].ToString());
Fit = 1;
}
}
}
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
private void InsertData()
{
try
{
using (var conn = CreateConnection())
{
var commandString = "INSERT INTO ShopSentences (BinaryStrings,Sentence,RowNumber) VALUES (#NewBinaryString,#NewSentence,#NewRowNumber)";
using (var comm = new SqlCommand(commandString, conn))
{
comm.Parameters.AddWithValue("#NewBinaryString", GenerateCode());
comm.Parameters.AddWithValue("#NewNewSentence", txtSentence.Text);
comm.Parameters.AddWithValue("#NewRowNumber", NewRowNum());
comm.ExecuteNonQuery();
}
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
}
//Checking the banary code in the last row
string GenerateCode()
{
string RowNo = RowFind();
int Row = int.Parse(RowNo);
int Code = Row + 1;
string Cd = Convert.ToString(Code, 2);
int Ln = Cd.Trim().Length;
if (Ln == 3)
{
Cd = "100" + Cd;
}
else if (Ln == 4)
{
Cd = "10" + Cd;
}
else if (Ln == 5)
{
Cd = "1" + Cd;
}
return Cd;
}
//Finding the last row
string RowFind()
{
using (var conn = CreateConnection())
{
var commandString = "SELECT * FROM ShopSentences";
using (var comm = new SqlCommand(commandString, conn))
{
using (var sda = new SqlDataAdapter(queryString, Connection))
{
using (DataTable dt = new DataTable("ShopSentences"))
{
sda.Fill(dt);
return dt.Rows[dt.Rows.Count - 1]["RowNumber"].ToString();
}
}
}
}
}
string NewRowNum()
{
var Row = RowFind();
var CalcRow = int.Parse(Row) + 1;
return CalcRow.ToString();
}
}
But this is just the beginning you should not have any hard SQL dependency in your Form classes.

When sharing same SqlConnection instance several times in your code, instead of directly opening the you can rather check the connection state first and then open it if not already opened. For example:
if(Connection.State!= ConnectionState.Open)
Connection.Open();

Reading data from sitecore webforms for marketeers database

I want to build a custom interface (a separate aspx page) to manage the data that is put into the webforms for marketeers (WFFM) database, and that for just one form. It must be possible to edit the data and select records with particular sortings and pagings. The database is configured to be SQLite.
Is this possible and recommended, or is it just plain xml that is saved into the WFFM database? And how should I go about it?

This is completely doable, though the select query to get data out of WFFM is a bit funky because everything is stored loose in one huge table called "field" with only a trail of GUIDs to tie the stored values back to what form they came from and what field.
Provided below is part of an Export to Excel utility I wrote for WFFM data. It builds a DataTable object from submitted form results. You could adapt it to some other structure without much work though.
public string connectionStringWFFM = "user id=sitecore_admin;password=xxx;Data Source=SitecoreDBServer.com;Database=Sitecore_WebForms";
protected DataTable BuildDataTable(Item formItem)
{
List<FormResult> formResults = FormResults(formItem.ID.Guid);
List<Field> distinctFields = DistinctFields(formItem.ID.Guid);
var dt = new DataTable();
dt.Columns.Add("Submission_DateTime", typeof (string));
foreach (Field field in distinctFields)
{
var dataColumn = new DataColumn("_" + field.id.ToString("N"), typeof (string));
dataColumn.Caption = field.name.Replace(" ", "_");
dt.Columns.Add(dataColumn);
}
foreach (FormResult formResult in formResults)
{
var connection = new SqlConnection();
connection.ConnectionString = connectionStringWFFM;
var command = new SqlCommand();
command.Connection = connection;
command.CommandText = "select fieldid, value from field where formid=#formid order by fieldid";
command.Parameters.Add("#formid", SqlDbType.UniqueIdentifier).Value = formResult.id;
connection.Open();
SqlDataReader reader = command.ExecuteReader();
DataRow dataRow = dt.NewRow();
dataRow["Submission_DateTime"] = formResult.timestamp.ToString("MM/dd/yyyy HH:mm:ss");
while (reader.Read())
{
dataRow["_" + reader.GetGuid(0).ToString("N")] = reader.GetValue(1).ToString().Replace("<item>", "").Replace("</item>", "");
}
dt.Rows.Add(dataRow);
reader.Close();
connection.Close();
}
return dt;
}
public List<Field> DistinctFields(Guid formitemid)
{
var connection = new SqlConnection();
connection.ConnectionString = connectionStringWFFM;
var command = new SqlCommand();
command.Connection = connection;
command.CommandText = "select distinct fieldid from field where formid in (select id from form where formitemid=#formitemid) order by fieldid";
command.Parameters.Add("#formitemid", SqlDbType.UniqueIdentifier).Value = formitemid;
connection.Open();
SqlDataReader reader = command.ExecuteReader();
var results = new List<Field>();
int count = 0;
while (reader.Read())
{
var field = new Field();
field.id = reader.GetGuid(0);
Database database = Factory.GetDatabase("master");
Item i = database.GetItem(new ID(field.id));
if (i != null && i.DisplayName != null)
{
field.name = i.DisplayName;
}
else
{
field.name = "Field" + count;
}
results.Add(field);
count += 1;
}
reader.Close();
connection.Close();
return results;
}
public List<FormResult> FormResults(Guid formitemid)
{
var connection = new SqlConnection();
connection.ConnectionString = connectionStringWFFM;
var command = new SqlCommand();
command.Connection = connection;
command.CommandText = "select id, timestamp from form where formitemid=#formitemid";
command.Parameters.Add("#formitemid", SqlDbType.UniqueIdentifier).Value = formitemid;
connection.Open();
SqlDataReader reader = command.ExecuteReader();
var results = new List<FormResult>();
while (reader.Read())
{
var result = new FormResult();
result.id = reader.GetGuid(0);
result.timestamp = reader.GetDateTime(1);
results.Add(result);
}
reader.Close();
connection.Close();
return results;
}
public class FormResult
{
public Guid id { get; set; }
public DateTime timestamp { get; set; }
}
public class Field
{
public Guid id { get; set; }
public string name { get; set; }
}

When dynamically assigning values to an ASP DropDownList using LINQ, I get a literal string returned for DataValueField

So I've been working on learning LINQ, and I think I'm doing this correctly, but when I spit out the value of the DropDownList's DataValueField property, it comes back as the string "mId" rather than the actual value (the menu_id). Even more strange, the DataTextField is being populated correctly, using the same syntax. Anyone have any ideas?
Here's my code:
protected void Page_Load(object sender, EventArgs e)
{
List<RobDAL.Menu.menuObj> menuInfo = new List<RobDAL.Menu.menuObj>();
menuInfo = RobDAL.Menu.GetMenuText();
menu.DataSource = from myMenu in menuInfo
select new { Text = myMenu.menuText,
mId = myMenu.menuId };
menu.DataValueField = "mId";
menu.DataTextField = "Text";
menu.DataBind();
}
Here's my Menu class:
public class Menu
{
public static int GetMainMenuByContentId(int contentid)
{
//SqlConnection connection = new SqlConnection(Configuration.ConnectionInfo);
Content myContent = new Content();
int menuid;
string queryString = "SELECT menu_id FROM menu_to_item_tbl where content_id = " + contentid + ";";
using (SqlConnection connection = new SqlConnection(Configuration.ConnectionInfo))
{
SqlCommand command = new SqlCommand(queryString, connection);
connection.Open();
try
{
menuid = (int)command.ExecuteScalar();
}
finally
{
// Always call Close when done reading.
connection.Close();
}
return menuid;
}
}
public static List<menuObj> GetMenuText()
{
//SqlConnection connection = new SqlConnection(Configuration.ConnectionInfo);
List<menuObj> allMenus = new List<menuObj>();
string queryString = "SELECT DISTINCT menu_id, menu_title FROM menu_to_item_tbl;";
using (SqlConnection connection = new SqlConnection(Configuration.ConnectionInfo))
{
SqlCommand command = new SqlCommand(queryString, connection);
connection.Open();
SqlDataReader reader = command.ExecuteReader();
try
{
while (reader.Read())
{
menuObj myMenu = new menuObj();
myMenu.menuId = Convert.ToInt16(reader[0]);
myMenu.menuText = reader[1].ToString();
allMenus.Add(myMenu);
}
}
finally
{
reader.Close();
}
return allMenus;
}
}
public class menuObj
{
public string menuText { get; set; }
public int menuId { get; set; }
}
}
Thanks!

Change
menu.DataSource = from myMenu in menuInfo
select new { Text = myMenu.menuText,
mId = myMenu.menuId };
to
menu.DataSource = (from myMenu in menuInfo
select new { Text = myMenu.menuText,
mId = myMenu.menuId }).ToList();;

That is because you have assigned a string to the DataValue property of your drop down list.
menu.DataValueField = "mId".
You might also want to check to see what your linq query is returning for mId.