Fill a DataGrid

Posted on February 11, 2011June 27, 2015 by coder

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

public class Form1 : System.Windows.Forms.Form {
    internal System.Windows.Forms.DataGrid DataGrid1;
    internal System.Windows.Forms.Button btnRunQuery;
    private System.Windows.Forms.Button btnRunQuery2;
    public Form1() {
        this.DataGrid1 = new System.Windows.Forms.DataGrid();
        this.btnRunQuery = new System.Windows.Forms.Button();
        this.btnRunQuery2 = new System.Windows.Forms.Button();
        ((System.ComponentModel.ISupportInitialize)(this.DataGrid1)).BeginInit();
        this.SuspendLayout();

        this.DataGrid1.DataMember = "";
        this.DataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
        this.DataGrid1.Location = new System.Drawing.Point(8, 8);
        this.DataGrid1.Size = new System.Drawing.Size(280, 200);

        this.btnRunQuery.Location = new System.Drawing.Point(8, 224);
        this.btnRunQuery.Size = new System.Drawing.Size(80, 24);
        this.btnRunQuery.Text = "Run Query 1";
        this.btnRunQuery.Click += new System.EventHandler(this.btnRunQuery_Click);

        this.btnRunQuery2.Location = new System.Drawing.Point(104, 224);
        this.btnRunQuery2.Size = new System.Drawing.Size(80, 24);
        this.btnRunQuery2.Text = "Run Query 2";
        this.btnRunQuery2.Click += new System.EventHandler(this.btnRunQuery2_Click);

        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
        this.ClientSize = new System.Drawing.Size(292, 273);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.btnRunQuery2,
                                                                          this.DataGrid1,
                                                                          this.btnRunQuery});
        ((System.ComponentModel.ISupportInitialize)(this.DataGrid1)).EndInit();
        this.ResumeLayout(false);

    }
    [STAThread]
    static void Main() {
        Application.Run(new Form1());
    }

    private void btnRunQuery_Click(object sender, System.EventArgs e) {
        try {
            SqlConnection cn = new SqlConnection("data source=.;database=biblio;uid=admin;pwd=pw");

            SqlDataAdapter da = new SqlDataAdapter("Select top 50 Author, Year_born from Authors Where Year_born is not null", cn);

            DataSet ds = new DataSet();

            da.Fill(ds, "Authors");

            DataGrid1.DataSource = ds.Tables["Authors"];
        } catch (SqlException ex) {
            Debug.WriteLine(ex.ToString());
        }
    }

    private void btnRunQuery2_Click(object sender, System.EventArgs e) {
        try {
            SqlConnection cn = new SqlConnection("data source=.;database=biblio;uid=admin;pwd=pw");

            SqlDataAdapter da = new SqlDataAdapter("Select Title, Price from Titles where Title like &#039;Hit%&#039;", cn);

            DataSet ds = new DataSet();

            da.Fill(ds, "Titles and Price");

            DataGrid1.DataSource = ds.Tables["Titles and Price"];
        } catch (SqlException ex) {
            Debug.WriteLine(ex.ToString());
        }
    }

}

Scrolling Data Binding

Posted on February 11, 2011June 27, 2015 by coder

   
 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using System.Configuration;
using System.Data.SqlClient;

public class Form1 : Form {
    public Form1() {
        InitializeComponent();
    }

    private void retrieve_Click(object sender, EventArgs e) {
        retrieve.Enabled = false;

        ds = CreateDataSet();

        textName.DataBindings.Add("Text", ds, "Products.ProductName");
        textQuan.DataBindings.Add("Text", ds, "Products.QuantityPerUnit");

        trackBar.Minimum = 0;
        trackBar.Maximum = this.BindingContext[ds, "Products"].Count - 1;

        textName.Enabled = true;
        textQuan.Enabled = true;
        trackBar.Enabled = true;
    }

    private DataSet CreateDataSet() {
        string customers = "SELECT * FROM Products";
        DataSet ds = new DataSet();

        using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["northwind"].ConnectionString)) {
            SqlDataAdapter da = new SqlDataAdapter(customers, con);

            da.Fill(ds, "Products");
        }

        return ds;
    }

    private void trackBar_Scroll(object sender, EventArgs e) {
        this.BindingContext[ds, "Products"].Position = trackBar.Value;
    }

    private DataSet ds;
    private void InitializeComponent() {
        this.retrieve = new System.Windows.Forms.Button();
        this.textName = new System.Windows.Forms.TextBox();
        this.textQuan = new System.Windows.Forms.TextBox();
        this.trackBar = new System.Windows.Forms.TrackBar();
        ((System.ComponentModel.ISupportInitialize)(this.trackBar)).BeginInit();
        this.SuspendLayout();

        this.retrieve.Location = new System.Drawing.Point(12, 12);
        this.retrieve.Size = new System.Drawing.Size(75, 23);
        this.retrieve.Text = "Retrieve";
        this.retrieve.UseVisualStyleBackColor = true;
        this.retrieve.Click += new System.EventHandler(this.retrieve_Click);

        this.textName.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
                    | System.Windows.Forms.AnchorStyles.Right)));
        this.textName.Enabled = false;
        this.textName.Location = new System.Drawing.Point(12, 42);
        this.textName.Size = new System.Drawing.Size(268, 20);

        this.textQuan.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
                    | System.Windows.Forms.AnchorStyles.Right)));
        this.textQuan.Enabled = false;
        this.textQuan.Location = new System.Drawing.Point(13, 69);
        this.textQuan.Size = new System.Drawing.Size(267, 20);
        this.trackBar.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left)
                    | System.Windows.Forms.AnchorStyles.Right)));
        this.trackBar.Enabled = false;
        this.trackBar.Location = new System.Drawing.Point(13, 96);
        this.trackBar.Size = new System.Drawing.Size(267, 45);
        this.trackBar.Scroll += new System.EventHandler(this.trackBar_Scroll);

        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(292, 148);
        this.Controls.Add(this.trackBar);
        this.Controls.Add(this.textQuan);
        this.Controls.Add(this.textName);
        this.Controls.Add(this.retrieve);
        this.Name = "Form1";
        this.Text = "ScrollingDataBinding";
        ((System.ComponentModel.ISupportInitialize)(this.trackBar)).EndInit();
        this.ResumeLayout(false);
        this.PerformLayout();

    }



    private System.Windows.Forms.Button retrieve;
    private System.Windows.Forms.TextBox textName;
    private System.Windows.Forms.TextBox textQuan;
    private System.Windows.Forms.TrackBar trackBar;
    [STAThread]
    static void Main() {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new Form1());
    }
}

Execute your Sql query

Posted on February 11, 2011June 27, 2015 by coder

   

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

public class Queries : System.Windows.Forms.Form {
    private System.Windows.Forms.TextBox txtResult;
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.Label label2;
    private System.Windows.Forms.Button cmdExecute;
    private System.Windows.Forms.TextBox txtSql;
    private System.ComponentModel.Container components = null;

    public Queries() {
        InitializeComponent();
    }
    private void InitializeComponent() {
        this.txtSql = new System.Windows.Forms.TextBox();
        this.txtResult = new System.Windows.Forms.TextBox();
        this.label1 = new System.Windows.Forms.Label();
        this.label2 = new System.Windows.Forms.Label();
        this.cmdExecute = new System.Windows.Forms.Button();
        this.SuspendLayout();

        this.txtSql.Location = new System.Drawing.Point(0, 32);
        this.txtSql.Multiline = true;
        this.txtSql.Name = "txtSql";
        this.txtSql.Size = new System.Drawing.Size(400, 72);
        this.txtSql.TabIndex = 0;
        this.txtSql.Text = "";

        this.txtResult.Location = new System.Drawing.Point(0, 184);
        this.txtResult.Multiline = true;
        this.txtResult.Name = "txtResult";
        this.txtResult.Size = new System.Drawing.Size(400, 88);
        this.txtResult.TabIndex = 1;
        this.txtResult.Text = "";

        this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
        this.label1.Location = new System.Drawing.Point(8, 8);
        this.label1.Name = "label1";
        this.label1.Size = new System.Drawing.Size(384, 16);
        this.label1.TabIndex = 2;
        this.label1.Text = "Type a SQL statement in the text box.";
        this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;

        this.label2.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
        this.label2.Location = new System.Drawing.Point(0, 160);
        this.label2.Name = "label2";
        this.label2.Size = new System.Drawing.Size(392, 16);
        this.label2.TabIndex = 3;
        this.label2.Text = "Execution Result";
        this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;

        this.cmdExecute.Location = new System.Drawing.Point(152, 112);
        this.cmdExecute.Name = "cmdExecute";
        this.cmdExecute.Size = new System.Drawing.Size(104, 32);
        this.cmdExecute.TabIndex = 4;
        this.cmdExecute.Text = "Execute Command";
        this.cmdExecute.Click += new System.EventHandler(this.cmdExecute_Click);

        this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
        this.ClientSize = new System.Drawing.Size(400, 275);
        this.Controls.Add(this.cmdExecute);
        this.Controls.Add(this.label2);
        this.Controls.Add(this.label1);
        this.Controls.Add(this.txtResult);
        this.Controls.Add(this.txtSql);
        this.Name = "Queries";
        this.Text = "Tables and Relationships";
        this.ResumeLayout(false);
   }
   private void cmdExecute_Click(object sender, System.EventArgs e) {
        try{
            SqlConnection conn = new SqlConnection(@"server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI"); 

            conn.Open();
            string strSQL=txtSql.Text;
            SqlCommand cmd= new SqlCommand(strSQL, conn);

            cmd.ExecuteReader();
            conn.Close();
            txtResult.Text = "SQL executed successfully.";
         } catch (System.Data.SqlClient.SqlException ex) {
            txtResult.Text =
               "There was an error in executing the SQL. " +
               "Error Message:" + ex.Message; 
         }

   }
   static void Main() {
      Application.Run(new Queries());
   }
}

Write data in database table to XML file

Posted on February 11, 2011June 27, 2015 by coder

   


using System;
using System.Data;
using System.Data.SqlClient;

   class WriteXML {
      static void Main(){
         string connString = "server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
         string qry = @"select * from employee";
         SqlConnection conn = new SqlConnection(connString);

         try{
            SqlDataAdapter da = new SqlDataAdapter();
            da.SelectCommand = new SqlCommand(qry, conn);
            conn.Open();

            DataSet ds = new DataSet();   
            da.Fill(ds, "employee");

            ds.WriteXml(@"employee.xml");
         } catch(Exception e) {
            Console.WriteLine("Error: " + e);
         } finally {
            conn.Close();
         }
      }
   }

Use the ExecuteXmlReader() method to run a SELECT statement that returns XML

Posted on February 11, 2011June 27, 2015 by coder

   


using System;
using System.Data;
using System.Data.SqlClient;
using System.Xml;

class ExecuteXmlReader
{
  public static void Main()
  {
    SqlConnection mySqlConnection =new SqlConnection("server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;");
    SqlCommand mySqlCommand = mySqlConnection.CreateCommand();

    mySqlCommand.CommandText = "SELECT TOP 5 ID, FirstName, LastName " +
      "FROM Employee " +
      "ORDER BY ID " +
      "FOR XML AUTO";

    mySqlConnection.Open();

    XmlReader myXmlReader = mySqlCommand.ExecuteXmlReader();

    myXmlReader.Read();
    while (!myXmlReader.EOF) {
      Console.WriteLine(myXmlReader.ReadOuterXml());
    }

    myXmlReader.Close();
    mySqlConnection.Close();
  }
}

How to write and read XML files

Posted on February 11, 2011June 27, 2015 by coder

   



   
using System;
using System.Data;
using System.Data.SqlClient;

class WriteAndReadXML {
    public static void Main() {
        SqlConnection mySqlConnection = new SqlConnection("server=localhost;database=Northwind;uid=sa;pwd=sa");

        SqlCommand mySqlCommand = mySqlConnection.CreateCommand();
        mySqlCommand.CommandText =
          "SELECT TOP 2 CustomerID, CompanyName, ContactName, " +
          "Address " +
          "FROM Customers " +
          "ORDER BY CustomerID";
        SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter();
        mySqlDataAdapter.SelectCommand = mySqlCommand;
        DataSet myDataSet = new DataSet();
        mySqlConnection.Open();
        mySqlDataAdapter.Fill(myDataSet, "Customers");
        mySqlConnection.Close();

        myDataSet.WriteXml("myXmlFile.xml");

        myDataSet.WriteXml("myXmlFile2.xml", XmlWriteMode.WriteSchema);

        myDataSet.WriteXmlSchema("myXmlSchemaFile.xml");

        myDataSet.Clear();

        myDataSet.ReadXml("myXmlFile.xml");

        DataTable myDataTable = myDataSet.Tables["Customers"];
        foreach (DataRow myDataRow in myDataTable.Rows) {
            Console.WriteLine("CustomerID = " + myDataRow["CustomerID"]);
            Console.WriteLine("CompanyName = " + myDataRow["CompanyName"]);
            Console.WriteLine("ContactName = " + myDataRow["ContactName"]);
            Console.WriteLine("Address = " + myDataRow["Address"]);
        }
    }
}

Fill Data from database table to ListView

Posted on February 11, 2011June 27, 2015 by coder

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

public class Form1 : System.Windows.Forms.Form {
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Button cmdExecute;
private System.Windows.Forms.TextBox txtSql;
private System.Windows.Forms.ListView lvwResult;
private System.ComponentModel.Container components = null;

public Form1() {
InitializeComponent();
}

private void InitializeComponent() {
this.label1 = new System.Windows.Forms.Label();
this.cmdExecute = new System.Windows.Forms.Button();
this.txtSql = new System.Windows.Forms.TextBox();
this.lvwResult = new System.Windows.Forms.ListView();
this.SuspendLayout();

this.label1.Location = new System.Drawing.Point(0, 0);
this.label1.Name = “label1”;
this.label1.Size = new System.Drawing.Size(296, 16);
this.label1.TabIndex = 0;
this.label1.Text = “Enter a SQL query or statement and click Execute.”;

this.cmdExecute.Location = new System.Drawing.Point(227, 224);
this.cmdExecute.Name = “cmdExecute”;
this.cmdExecute.TabIndex = 1;
this.cmdExecute.Text = “Execute”;
this.cmdExecute.Click += new System.EventHandler(this.cmdExecute_Click);

this.txtSql.Location = new System.Drawing.Point(0, 16);
this.txtSql.Multiline = true;
this.txtSql.Name = “txtSql”;
this.txtSql.Size = new System.Drawing.Size(528, 200);
this.txtSql.TabIndex = 2;
this.txtSql.Text = “”;

this.lvwResult.GridLines = true;
this.lvwResult.Location = new System.Drawing.Point(0, 256);
this.lvwResult.Name = “lvwResult”;
this.lvwResult.Size = new System.Drawing.Size(528, 200);
this.lvwResult.TabIndex = 3;
this.lvwResult.View = System.Windows.Forms.View.Details;

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(528, 452);
this.Controls.Add(this.lvwResult);
this.Controls.Add(this.txtSql);
this.Controls.Add(this.cmdExecute);
this.Controls.Add(this.label1);
this.Name = “Form1”;
this.Text = “Query Processor”;
this.ResumeLayout(false);
}

static void Main() {
Application.Run(new Form1());
}

private void cmdExecute_Click(object sender, System.EventArgs e) {
SqlConnection conn = new SqlConnection(“server=(local)SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI”);

try {
lvwResult.Columns.Clear() ;
lvwResult.Items.Clear();

conn.Open();
txtSql.Text =”select * from Employee”;

SqlCommand cmd = conn.CreateCommand();
cmd.CommandText = txtSql.Text;

SqlDataReader dr = cmd.ExecuteReader();

for (int i = 0; i< dr.FieldCount; i++) { ColumnHeader ch = new ColumnHeader(); ch.Text=dr.GetName(i); lvwResult.Columns.Add(ch); } ListViewItem itmX; while (dr.Read()) { itmX=new ListViewItem(); itmX.Text= dr.GetValue(0).ToString(); for (int i=1 ; i< dr.FieldCount; i++) { itmX.SubItems.Add(dr.GetValue(i).ToString()); } lvwResult.Items.Add(itmX); } dr.Close(); } catch ( System.Data.SqlClient.SqlException ex) { Console.WriteLine("There was an error in executing the SQL." + " Error Message:" + ex.Message, "SQL"); } finally { conn.Close(); } } } [/csharp]

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