Unable to view table in SQL Express 5

Question

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)

{

}

}

}