Please help with SQL Server Express 5

Can someone please help me with the following problem. I am trying to create a program in .NEt 2003 which connects to a database table in SQL server Express 5. However, after connecting to the local server, I then try to run the program and when I try to view the table in SQL express I get a 'System.NullreferenceException' and when I view the debug details it says that 'object reference is not set to an instance of an object' which am uncertain how to correct.

I have added a connection object which is initialsied with the address of the datable in SQL. Please find below the code that I am using showing the initialised connection object and also the table being called in 'button6' control.

I would greatly appreciate any help....thanks

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;

namespace MovieBase
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Button button4;
private System.Windows.Forms.Button button5;
private System.Data.SqlClient.SqlConnection sqlConnection1;
private System.Windows.Forms.ComboBox GengreList;
private System.Windows.Forms.Button button6;
private System.Windows.Forms.Button button7;
private System.Data.SqlClient.SqlCommand sqlSelectCommand1;
private System.Data.SqlClient.SqlCommand sqlInsertCommand1;
private System.Data.SqlClient.SqlDataAdapter sqlDataAdapter1;
private System.Windows.Forms.Label label2;
public DataSet MDSet = new DataSet();
SqlDataAdapter MyAdapt;
private System.Data.SqlClient.SqlCommand sqlSelectCommand2;
private System.Data.SqlClient.SqlCommand sqlInsertCommand2;
private System.Data.SqlClient.SqlDataAdapter sqlDataAdapter2;
//Connection object being initialised
public SqlConnection MovCon = new SqlConnection("Data Source = SHERMAN/SQLEXPRESS;Initial Catalog= MovieDBase;User Id=myUsername;Password=myPassword");






/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();



//
// TODO: Add any constructor code after InitializeComponent call
//
}

/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.label1 = new System.Windows.Forms.Label();
this.button4 = new System.Windows.Forms.Button();
this.button5 = new System.Windows.Forms.Button();
this.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
this.GengreList = new System.Windows.Forms.ComboBox();
this.button6 = new System.Windows.Forms.Button();
this.button7 = new System.Windows.Forms.Button();
this.sqlSelectCommand1 = new System.Data.SqlClient.SqlCommand();
this.sqlInsertCommand1 = new System.Data.SqlClient.SqlCommand();
this.sqlDataAdapter1 = new System.Data.SqlClient.SqlDataAdapter();
this.label2 = new System.Windows.Forms.Label();
this.sqlSelectCommand2 = new System.Data.SqlClient.SqlCommand();
this.sqlInsertCommand2 = new System.Data.SqlClient.SqlCommand();
this.sqlDataAdapter2 = new System.Data.SqlClient.SqlDataAdapter();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(184, 168);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(96, 23);
this.button1.TabIndex = 0;
this.button1.Text = "Add A Movie";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(184, 248);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(96, 23);
this.button2.TabIndex = 1;
this.button2.Text = "Delete A Movie";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(184, 208);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(96, 23);
this.button3.TabIndex = 2;
this.button3.Text = "View Movies";
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// label1
//
this.label1.Font = new System.Drawing.Font("Myriad Web Pro", 14.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.label1.Location = new System.Drawing.Point(280, 8);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(120, 24);
this.label1.TabIndex = 3;
this.label1.Text = "MOVIEBASE";
//
// button4
//
this.button4.Location = new System.Drawing.Point(448, 344);
this.button4.Name = "button4";
this.button4.Size = new System.Drawing.Size(192, 23);
this.button4.TabIndex = 4;
this.button4.Text = "Current Movie Count";
this.button4.Click += new System.EventHandler(this.button4_Click);
//
// button5
//
this.button5.Location = new System.Drawing.Point(496, 112);
this.button5.Name = "button5";
this.button5.Size = new System.Drawing.Size(128, 32);
this.button5.TabIndex = 5;
this.button5.Text = "Find Movie";
this.button5.Click += new System.EventHandler(this.button5_Click);
//
// sqlConnection1
//
this.sqlConnection1.ConnectionString = "workstation id=SHERMAN;packet size=4096;integrated security=SSPI;data source=\"SHE" +
"RMAN\\SQLEXPRESS\";persist security info=False;initial catalog=MovieDBase";
this.sqlConnection1.InfoMessage += new System.Data.SqlClient.SqlInfoMessageEventHandler(this.sqlConnection1_InfoMessage);
//
// GengreList
//
this.GengreList.BackColor = System.Drawing.SystemColors.InactiveCaptionText;
this.GengreList.Items.AddRange(new object[] {
"Horror",
"Comedy",
"Family/Entertainment",
"Drama",
"Boxsets",
"Sci -fi/Fantasy"});
this.GengreList.Location = new System.Drawing.Point(184, 344);
this.GengreList.Name = "GengreList";
this.GengreList.Size = new System.Drawing.Size(121, 21);
this.GengreList.TabIndex = 6;
//
// button6
//
this.button6.Location = new System.Drawing.Point(264, 104);
this.button6.Name = "button6";
this.button6.Size = new System.Drawing.Size(160, 40);
this.button6.TabIndex = 7;
this.button6.Text = "View Movie List";
this.button6.Click += new System.EventHandler(this.button6_Click);
//
// button7
//
this.button7.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.button7.Location = new System.Drawing.Point(360, 432);
this.button7.Name = "button7";
this.button7.Size = new System.Drawing.Size(104, 40);
this.button7.TabIndex = 8;
this.button7.Text = "Exit Movie Base";
this.button7.Click += new System.EventHandler(this.button7_Click);
//
// sqlSelectCommand1
//
this.sqlSelectCommand1.CommandText = "SELECT [Item Number], [Movie Title], Genre, [Date of Release], Director FROM [Mov" +
"Table 1]";
this.sqlSelectCommand1.Connection = this.sqlConnection1;
//
// sqlInsertCommand1
//
this.sqlInsertCommand1.CommandText = "INSERT INTO [MovTable 1] ([Item Number], [Movie Title], Genre, [Date of Release]," +
" Director) VALUES (@Param1, @Param2, @Genre, @Param3, @Director); SELECT [Item N" +
"umber], [Movie Title], Genre, [Date of Release], Director FROM [MovTable 1]";
this.sqlInsertCommand1.Connection = this.sqlConnection1;
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Param1", System.Data.SqlDbType.VarChar, 50, "Item Number"));
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Param2", System.Data.SqlDbType.VarChar, 50, "Movie Title"));
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Genre", System.Data.SqlDbType.VarChar, 50, "Genre"));
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Param3", System.Data.SqlDbType.VarChar, 50, "Date of Release"));
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Director", System.Data.SqlDbType.VarChar, 50, "Director"));
//
// sqlDataAdapter1
//
this.sqlDataAdapter1.InsertCommand = this.sqlInsertCommand1;
this.sqlDataAdapter1.SelectCommand = this.sqlSelectCommand1;
this.sqlDataAdapter1.TableMappings.AddRange(new System.Data.Common.DataTableMapping[] {
new System.Data.Common.DataTableMapping("Table", "MovTable 1", new System.Data.Common.DataColumnMapping[] {
new System.Data.Common.DataColumnMapping("Item Number", "Item Number"),
new System.Data.Common.DataColumnMapping("Movie Title", "Movie Title"),
new System.Data.Common.DataColumnMapping("Genre", "Genre"),
new System.Data.Common.DataColumnMapping("Date of Release", "Date of Release"),
new System.Data.Common.DataColumnMapping("Director", "Director")})});
this.sqlDataAdapter1.RowUpdated += new System.Data.SqlClient.SqlRowUpdatedEventHandler(this.sqlDataAdapter1_RowUpdated);
//
// label2
//
this.label2.Font = new System.Drawing.Font("Myriad Web Pro", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.label2.Location = new System.Drawing.Point(64, 344);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(120, 23);
this.label2.TabIndex = 9;
this.label2.Text = "Genres";
//
// sqlSelectCommand2
//
this.sqlSelectCommand2.CommandText = "SELECT [Item Number], [Movie Title], Genre, [Date of Release], Director FROM [Mov" +
"Table 1]";
this.sqlSelectCommand2.Connection = this.sqlConnection1;
//
// sqlInsertCommand2
//
this.sqlInsertCommand2.CommandText = "INSERT INTO [MovTable 1] ([Item Number], [Movie Title], Genre, [Date of Release]," +
" Director) VALUES (@Param1, @Param2, @Genre, @Param3, @Director); SELECT [Item N" +
"umber], [Movie Title], Genre, [Date of Release], Director FROM [MovTable 1]";
this.sqlInsertCommand2.Connection = this.sqlConnection1;
this.sqlInsertCommand2.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Param1", System.Data.SqlDbType.VarChar, 50, "Item Number"));
this.sqlInsertCommand2.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Param2", System.Data.SqlDbType.VarChar, 50, "Movie Title"));
this.sqlInsertCommand2.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Genre", System.Data.SqlDbType.VarChar, 50, "Genre"));
this.sqlInsertCommand2.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Param3", System.Data.SqlDbType.VarChar, 50, "Date of Release"));
this.sqlInsertCommand2.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Director", System.Data.SqlDbType.VarChar, 50, "Director"));
//
// sqlDataAdapter2
//
this.sqlDataAdapter2.InsertCommand = this.sqlInsertCommand2;
this.sqlDataAdapter2.SelectCommand = this.sqlSelectCommand2;
this.sqlDataAdapter2.TableMappings.AddRange(new System.Data.Common.DataTableMapping[] {
new System.Data.Common.DataTableMapping("Table", "MovTable 1", new System.Data.Common.DataColumnMapping[] {
new System.Data.Common.DataColumnMapping("Item Number", "Item Number"),
new System.Data.Common.DataColumnMapping("Movie Title", "Movie Title"),
new System.Data.Common.DataColumnMapping("Genre", "Genre"),
new System.Data.Common.DataColumnMapping("Date of Release", "Date of Release"),
new System.Data.Common.DataColumnMapping("Director", "Director")})});
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.BackColor = System.Drawing.SystemColors.InactiveCaption;
this.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("$this.BackgroundImage")));
this.ClientSize = new System.Drawing.Size(704, 502);
this.Controls.Add(this.label2);
this.Controls.Add(this.button7);
this.Controls.Add(this.button6);
this.Controls.Add(this.GengreList);
this.Controls.Add(this.button5);
this.Controls.Add(this.button4);
this.Controls.Add(this.label1);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());

}

private void sqlConnection1_InfoMessage(object sender, System.Data.SqlClient.SqlInfoMessageEventArgs e)
{

}

private void button5_Click(object sender, System.EventArgs e)
{
MessageBox.Show("///Under Construction");
}

private void button1_Click(object sender, System.EventArgs e)
{
MessageBox.Show("///Under Construction");
}

private void button2_Click(object sender, System.EventArgs e)
{
MessageBox.Show("///Under Construction");
}

private void button3_Click(object sender, System.EventArgs e)
{
MessageBox.Show("///Under Construction");
}

private void button4_Click(object sender, System.EventArgs e)
{
MessageBox.Show("There is currently no movie count available");
}
//button6_control
private void button6_Click(object sender, System.EventArgs e)
{

Form2 F2 = new Form2();
sqlConnection1.Open();
MyAdapt.Fill(MDSet, "MovTable 1");
F2.dataGrid1.DataSource = MDSet;
}

private void button7_Click(object sender, System.EventArgs e)
{
this.Close();
sqlConnection1.Close();
}

private void sqlDataAdapter1_RowUpdated(object sender, System.Data.SqlClient.SqlRowUpdatedEventArgs e)
{

}
}
}

Can't look at that mess without you going back to add code tags.

Code:

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' only way to read it

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Quote:

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Originally Posted by dglienna

Can't look at that mess without you going back to add code tags.

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And in the codetags do a correct formatting. The best way is to use the formatted code and paste it into the standard texteditor, then copy it from there to here between the codetags and you will have a wonderful formatting. And sign the line where the exception occurs.

From what I can see "MyAdapt" is never initialised and gets the default value for its type (i.e. null) and hence the NullReferenceException you're getting. Check it out.

Hope it helps.