Posts Tagged Data

Class to Simplify and Minimize Code for Stored Procedures and TSQL

First of all if you are using TSQL in your code you really need to get in a another line of work. It isn’t scalable, difficult to maintain and is generally a bad practice. But I know some of you still do it so I did include it. This class will allow you to in a few lines of code do your select, update, insert or delete statements in a very few lines of code. All that is required of the developer is to list the values in order (if you are using stored procedures) that are required. Also included is how to declare a new instance of a sqlparametercollection – which you aren’t suppose to be able to do. I ended up not needing it but included it just in case someone needs to do that someday. Also if you are using a strongly typed dataset there is a method included of how to do that. After the code is example of usage. Have a great day!

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;

using System.IO;

using System.Data.SqlClient;

public class clsData
{

    public SqlConnection sqlconn = new SqlConnection();
    public string Error_Message;
    public List<SqlParameter> ParamList = new List<SqlParameter>();
    public ArrayList ParamValues = new ArrayList();

    public int SQLExecuteNonQueryValue;
    public clsData()
   

    public enum SQLAction
    {
        SelectAction,
        UpdateInsertDeleteAction
    }

    public virtual DataTable DataAction(clsData.SQLAction Action, DataTable dt, string cmdtext, string ParamValues = “”)
    {
        SQLExecuteNonQueryValue = -1;
        SqlCommand cmd = new SqlCommand();
        cmd.CommandText = cmdtext;
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Connection = sqlconn;
        this.GetParameterList(cmdtext);
        if (!string.IsNullOrEmpty(Error_Message)) {
            return null;
        }
        if (!string.IsNullOrEmpty(ParamValues)) {
            this.ParseSQLParameterValues(ParamValues);
            for (i = 0; i <= this.ParamList.Count – 1; i++) {
                cmd.Parameters.AddWithValue(this.ParamList[i].ToString(), this.ParamValues[i].ToString());
            }
        }
        //Debug.WriteLine(cmd.CommandText)
        try {
            cmd.Connection.Open();
            switch (Action) {
                case SQLAction.SelectAction:
                    dt.Load(cmd.ExecuteReader());
                    break;
                case SQLAction.UpdateInsertDeleteAction:
                    //Check this value to make sure everything went ok
                    SQLExecuteNonQueryValue = cmd.ExecuteNonQuery();
                    cmd.Connection.Close();
                    return null;
            }
            cmd.Connection.Close();

        } catch (Exception ex) {
            Error_Message = “There was a problem with ” + cmdtext + “. “;
            return null;
        }

        //removing duplicate table from dataset
        for (i = 0; i <= ds_Copy.Tables.Count – 1; i++) {
            if (ds_Copy.Tables(i).TableName == dt.TableName) {
                ds_Copy.Tables(i).Clear();
                ds_Copy.Tables(i).Columns.Clear();
            }
        }

        //placing datatable in the dataset
        ds_Copy.Merge(dt, false, MissingSchemaAction.Add);
        Error_Message = “”;
        return dt;
    }

    public DataTable DataActionTSQL(clsData.SQLAction Action, DataTable dt, string sqlstring)
    {
        SQLExecuteNonQueryValue = -1;
        SqlCommand cmd = new SqlCommand();
        cmd.CommandText = sqlstring;
        cmd.Connection = sqlconn;
        try {
            cmd.Connection.Open();
            switch (Action) {
                case SQLAction.SelectAction:
                    dt.Load(cmd.ExecuteReader());
                    break;
                case SQLAction.UpdateInsertDeleteAction:
                    //Check this value to make sure everything went ok
                    SQLExecuteNonQueryValue = cmd.ExecuteNonQuery();
                    cmd.Connection.Close();
                    return null;
            }
            cmd.Connection.Close();

        } catch (Exception ex) {
            Error_Message = “There was a problem with ” + sqlstring + “. “;
            return null;
        }
        //removing duplicate table from dataset
        for (i = 0; i <= ds_Copy.Tables.Count – 1; i++) {
            if (ds_Copy.Tables(i).TableName == dt.TableName) {
                ds_Copy.Tables(i).Clear();
                ds_Copy.Tables(i).Columns.Clear();
            }
        }
        //placing datatable in the dataset
        ds_Copy.Merge(dt, false, MissingSchemaAction.Add);
        Error_Message = “”;
        return dt;
    }

    private List<SqlParameter> GetParameterList(string ProcName)
    {
        //Get the parameters for the selected stored procedure
        List<SqlParameter> inputParamList = new List<SqlParameter>();
        ParamList.Clear();

        using (SqlConnection cn = new SqlConnection()) {
            DispatcherTool.My.MySettings Settings = new DispatcherTool.My.MySettings();
            cn.ConnectionString = Settings.SRAConnectionString;
            SqlCommand myCommand = new SqlCommand();
            myCommand.Connection = cn;
            myCommand.CommandText = ProcName;
            myCommand.CommandType = System.Data.CommandType.StoredProcedure;
            try {
                cn.Open();
                SqlCommandBuilder.DeriveParameters(myCommand);
                cn.Close();
            } catch (Exception ex) {
                Error_Message = “There was a problem with the connection to the database.”;
                return null;
            }

            //Dim sqlparams As SqlParameterCollection = DirectCast(GetType(SqlParameterCollection).GetConstructor(BindingFlags.NonPublic Or BindingFlags.Instance, Nothing, Type.EmptyTypes, Nothing).Invoke(Nothing), SqlParameterCollection)

            foreach (SqlParameter param in myCommand.Parameters) {
                if (param.Direction == System.Data.ParameterDirection.Input || param.Direction == System.Data.ParameterDirection.InputOutput) {
                    //sqlparams.Add(param.ParameterName & ” – ” & param.SqlDbType.ToString())
                    //Debug.WriteLine(param.ParameterName & ” – ” & param.SqlDbType.ToString())
                    inputParamList.Add(param);
                    //Else
                    // sqlparams.Add(param.ParameterName & ” – ” & param.SqlDbType)
                    //Debug.WriteLine(param.ParameterName & ” -2 ” & param.SqlDbType)
                }
            }
        }
        this.ParamList = inputParamList;
        Error_Message = “”;
        return this.ParamList;
    }

    public void ParseSQLParameterValues(string ValueString)
    {
        ParamValues.Clear();
        string[] parts = ValueString.Split(new char[] { ‘,’ });
        string part = null;
        foreach (string part_loopVariable in parts) {
            part = part_loopVariable;
            ParamValues.Add(part);
        }
    }

    //’Public Shared Function ConvertToTypedDataTable(Of T As {Data.DataTable, New})(ByVal dtBase As Data.DataTable) As T
    //’    Dim dtTyped As New T
    //’    dtTyped.Merge(dtBase)
    //’    Return dtTyped
    //’End Function

}

And then it’s use…..

private void Button1_Click(System.Object sender, System.EventArgs e)
{
    Strongly_Typed_DataSet.usp_Your_Stored_Procedure dt = new Strongly_Typed_DataSet.usp_Your_Stored_Procedure();

    DataGridView1.DataSource = cn.DataAction(clsData.SQLAction.SelectAction, dt, ds.usp_Get_PrinterName_for_PickList_Printing.ToString, “Tubing”);

    //DataGridView1.DataSource = cn.DataActionTSQL(clsData.SQLAction.SelectAction, dt, “SELECT *FROM Your_Table”)

}


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C# Application linked to SharePoint List Web Service

This weekend found myself knee deep in a crisis that my friend who had migrated from SharePoint 2003 to 2007 (there were reasons he couldn’t go to 2010). Simply put the migration from SharePoint 2003 to 2007 had broken his application (tracking program that submitted data to a 2003 SharePoint List) because in SharePoint 2007  you can’t do this while not on the actual server if you have “Web Page Security Validation” enabled. So for the code below you have to have SPWeb.AllowUnsafeUpdates = true; . Obviously not the ideal solution for my friend but we didn’t have time to screw around. Here is what I did….

 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Collections;
using System.Xml;
using System.ServiceModel;
using System.Net;
 
namespace Trigger_Tracker
{
    public partial class Form1 : Form
    {//form move on click and drag
        bool FormMoving;
        Point initialPoint;
        TriggerTrackerPictureBox frmPicture;
 
        public Form1()
        {//form move on click and drag
            InitializeComponent();
            comboBox1.SelectedIndex = 0;
            FormMoving = false;
 
            frmPicture = new TriggerTrackerPictureBox();
            frmPicture.localForm = this;
            frmPicture.Owner = this;
            frmPicture.Show();
            frmPicture.Width = 68;
            frmPicture.Height = 65;
            SetPositionOfPictureForm();
        }
 
        private void SetPositionOfPictureForm()
        {
            frmPicture.Top = this.Top + 26;
            frmPicture.Left = this.Left + 87;
        }
 
       
 
        private void TrackerButton(object sender, EventArgs e)
        {
            string listGUID = “A93E1A7E-67D0-4D7D-A4ED-803D7DFE684B”;
            string viewGUID = “6B2F3EF2-4B0C-41E1-B87E-0C3185B587DD”;
            //string viewGUID2 = “6B2F3EF2-4B0C-41E1-B87E-0C3185B587DD”;
 
            int ItemCounter = 1;
            ServiceList.Lists listService = new ServiceList.Lists();
           // RetentionLists.ListsSoapClient listService = new RetentionLists.ListsSoapClient();
 
            //////
           listService.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;
           //listService.ChannelFactory.Credentials.Windows.ClientCredential   = System.Net.CredentialCache.DefaultNetworkCredentials;
 
            XmlNode activeItemData = listService.GetListItems(listGUID, viewGUID, null, null, “100”, null);
            XmlDocument xDoc = new XmlDocument();
            string tmpString = activeItemData.InnerXml.Replace(“\r\r”, “”);
            xDoc.LoadXml(tmpString);
            XmlNamespaceManager nsManager = new XmlNamespaceManager(xDoc.NameTable);
            nsManager.AddNamespace(“z”, “#RowsetSchema”);
            nsManager.AddNamespace(“rs”, “urn:schemas-microsoft-com:rowset”);
 
            XmlNodeList xNode = xDoc.SelectNodes(“/rs:data/z:row”, nsManager);
 
            foreach (XmlNode tmpNode in xNode)
                ItemCounter++;
 
            StringBuilder strBuilder = new StringBuilder();
            strBuilder.Append(“<Method ID='” + ItemCounter + “‘ Cmd=’New’>”);
            strBuilder.Append(“<Field Name=’Attachments’>” + “0” + “</Field>”);
            strBuilder.Append(“<Field Name=’Title’>” + PolicyNumber.Text + “</Field>”);
            strBuilder.Append(“<Field Name=’Reason’>” + comboBox1.Text + “</Field>”);
            strBuilder.Append(“</Method>”);
 
            string strBatch = strBuilder.ToString();
 
            XmlDocument newDoc = new XmlDocument();
            XmlElement newElement = newDoc.CreateElement(“Batch”);
            newElement.SetAttribute(“OnError”, “Continue”);
            newElement.SetAttribute(“ViewName”, viewGUID);
            newElement.InnerXml = strBatch;
           
            XmlNode returnNode = listService.UpdateListItems(listGUID, newElement);
 
            this.comboBox1.Text = “Please Select….”;
            this.PolicyNumber.Text = “”;
            this.PolicyNumber.Mask = “0000000000”;
 
            comboBox1.Focus();
        }
 
       
 
 
        public void Form1_MouseUp(object sender, MouseEventArgs e)
        {//form move on click and drag
            FormMoving = false;
        }
 
        public void Form1_MouseMove(object sender, MouseEventArgs e)
        {//form move on click and drag
            if (FormMoving)
            {
                if ((Left + e.X – initialPoint.X) <= 0)
                    Left = 0;
                else if ((Right + e.X – initialPoint.X) >= Screen.PrimaryScreen.Bounds.Right)
                    Left = Screen.PrimaryScreen.Bounds.Right – Width;
                else
                    Left = Left + e.X – initialPoint.X;
                if ((Top + e.Y – initialPoint.Y) <= 0)
                    Top = 0;
                else if ((Bottom + e.Y – initialPoint.Y) >= Screen.PrimaryScreen.Bounds.Bottom)
                    Top = Screen.PrimaryScreen.Bounds.Bottom – Height;
                else
                    Top = Top + e.Y – initialPoint.Y;
            }
            SetPositionOfPictureForm();
        }
 
        public void Form1_MouseDown(object sender, MouseEventArgs e)
        {//form move on click and drag
            FormMoving = true;
            initialPoint = new Point(e.X, e.Y);
        }
 
        public void pictureBox1_MouseDown(object sender, MouseEventArgs e)
        {//form move on click and drag
            FormMoving = true;
            initialPoint = new Point(e.X, e.Y);
        }
 
        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
        {
        }
 
        private void pictureBox1_MouseHover(object sender, EventArgs e)
        {
        }
 
        public void label1_MouseHover(object sender, EventArgs e)
        {
            FormMoving = false;
        }
 
        public void label1_MouseUp(object sender, MouseEventArgs e)
        {
            FormMoving = false;
        }
 
       
 
        public void Form1_MouseHover(object sender, EventArgs e)
        {
            this.Opacity = 1;
        }
 
        public void Form1_MouseLeave(object sender, EventArgs e)
        {
            if(!PolicyNumber.Focused)
                this.Opacity = .25;
        }
 
        public void pictureBox1_MouseLeave(object sender, EventArgs e)
        {
            this.Opacity = 1;
        }
 
        public void pictureBox1_MouseHover_1(object sender, EventArgs e)
        {
            this.Opacity = 1;
        }
 
        public void Form1_Click(object sender, EventArgs e)
        {
            comboBox1.Focus();
        }
    }
}

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Databind ComboBox with WPF and C#

Its been a while my apologies. I have been extremely busy.

This topic came up because in existing applications data binding at design time was heavily used. I personally avoid such data binding as much as possible because well in all honesty it causes me a lot of problems later on. I realize many of you live and die with it. So don’t take it personally.

So I am converting one of these apps to XAML and WPF. They insisted I maintain a ComboBox databind. As many of you know data binding has changed a bit in WPF from your standard application. I created a property to bind the ComboBox to. I set the DataContext of the page to itself, which I like to do. It lets me expose various properties and quickly bind to them. Have a great weekend!

XAML
—-
        <ComboBox
            Height=”23″
            HorizontalAlignment=”Left”
            Margin=”10,10,0,0″
            Name=”comboBox1″
            VerticalAlignment=”Top”
            Width=”120″
            ItemsSource=”{Binding MyDataColumns}”
            DisplayMemberPath=”ColumnName”
            />
 
CODE BEHIND
—-
 
public partial class Window1 : Window
{
    public Window1()
    {
        InitializeComponent();
        LoadData();
        DataContext = this;
    }
 
    private DataTable _dataTable = null;
 
    private void LoadData()
    {
        SqlConnection cn = null;
        SqlCommand cmd = null;
        SqlDataAdapter adapter = null;
        DataSet dataSet = null;
 
        try
        {
            cn = new SqlConnection(“Data Source=MyMachine;Initial Catalog=MyDb;Integrated Security=True”);
            cmd = new SqlCommand(“select top 1 * from MyTable”, cn);
            adapter = new SqlDataAdapter(cmd);
            dataSet = new DataSet();
 
            adapter.Fill(dataSet);
 
            _dataTable = dataSet.Tables[0];
        }
        finally
        {
            if (cmd != null)
                cmd.Dispose();
 
            if (adapter != null)
                adapter.Dispose();
 
            if (dataSet != null)
                dataSet.Dispose();
 
            if (cn != null)
                cn.Dispose();
        }           
    }
 
    public IEnumerable MyDataColumns
    {
        get
        {
            return (IEnumerable)_dataTable.Columns;
        }
    }
}

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Check if SQL Database Exists with C#

Good Morning! I wanted to give a shout out to another blogger who linked to us yesterday here. It was so nice of him you know? Just amazing, the generosity of some folks out there!

Today’s code was a rewrite of the vb.net code here but using C#. One thing of note is that the Using keyword has a completely different meaning in C# so thus has been removed. It wasn’t really needed anyway.

Anyway, so make it a great day!

public Boolean testDatabaseExists(string server, string database)
        {
            String connString = (“Data Source=” + (server + “;Initial Catalog=master;Integrated Security=True;”));
            String cmdText = (“select * from master.dbo.sysdatabases where name=\'” + (database + “\'”));
            Boolean bRet;

            System.Data.SqlClient.SqlConnection sqlConnection = new System.Data.SqlClient.SqlConnection(connString);
            System.Data.SqlClient.SqlCommand sqlCmd = new System.Data.SqlClient.SqlCommand(cmdText, sqlConnection);
           
            try
            {
            sqlConnection.Open();
            System.Data.SqlClient.SqlDataReader reader = sqlCmd.ExecuteReader();
            bRet = reader.HasRows;
            sqlConnection.Close();
            }
            catch (Exception e)
            {
            bRet = false;
            sqlConnection.Close();
            MessageBox.Show(e.Message);
            return false;
            } //End Try Catch Block
                      
           
            if (bRet == true)
            {
                MessageBox.Show(“DATABASE EXISTS”);
                return true;
            }
            else
            {
                MessageBox.Show(“DATABASE DOES NOT EXIST”);
                return false;
            } //END OF IF

           
        } //END FUNCTION

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Write Data From DataTable To Excel With an Array Using C#

This is actually a redo of code written in vb.net a while back that dumps data from a datatable in a dataset into an excel spreadsheet in an effective and fast manner. I am always getting asked how to do this in C# so I decided to put that up today. Yes, I do C# too! Just didn’t want to admit it….

It’s pretty self explanatory. Don’t forget to clean up your excel instance when done. If you have any questions please feel free to send me an email.

Import an excel reference and at the top of your code you need your import statements. Then simply pass your dataset and datatable (granted you could just pass the datatable – I had my reasons for passing the dataset too at the time) to the method. The array is declared as an object because sometimes the compiler has to deal with unforeseen data issues that might arise and it has been effective for me to do let it handle those situations as they arise. I hope you find this useful.

using Excel = Microsoft.Office.Interop.Excel;
using Office = Microsoft.Office.Core;

public void CreateSpreadSheetFromDataSet(DataSet ds, DataTable dt)
        {

            Excel.Application Excel = new Excel.Application();
            Excel.Visible = true;
            Excel.Worksheet WSheet = new Excel.Worksheet();
            Excel.Workbooks.Add();
            WSheet = Excel.ActiveWorkbook.ActiveSheet;
            int rows = ds.Tables[dt.TableName].Rows.Count;
            int columns = ds.Tables[dt.TableName].Columns.Count;
            int r = 0; int c = 0;
            object[,] DataArray = new object[rows + 1, columns + 1];
            for (c = 0; c <= columns – 1; c++)
            {
                DataArray[r, c] = ds.Tables[dt.TableName].Columns[c].ColumnName;
                for (r = 0; r <= rows – 1; r++)
                {
                    DataArray[r, c] = ds.Tables[dt.TableName].Rows[r][c];
                } //end row loop
            } //end column loop

//actually write array to Excel Spreadsheet
            WSheet.Range[“A2”].Resize[rows, columns].Value = DataArray;

            //write header row to spreadsheet
            int DataTableColumnCounter;
            int ExcelColumnCounter = 1; //excel spreadsheets start at 1 when counting columns not zero!
            for (DataTableColumnCounter = 0; DataTableColumnCounter <= ds.Tables[dt.TableName].Columns.Count – 1; DataTableColumnCounter++)
            {
                WSheet.Cells[1, ExcelColumnCounter].Value = ds.Tables[dt.TableName].Columns[DataTableColumnCounter].ColumnName;
                ExcelColumnCounter = ExcelColumnCounter + 1; //moving to next column
            }
        }

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