How to compare a sql server table field with a csv field and display what is not in the sql table.

[Sascha Lefevre]

Hi Norris, what difficulty do you have with integrating the CSV-Reader? Basically you download it (either just the binaries or the source-zip), reference the DLL in your project and then use the first code-example from the article as a starting point. Your options for inserting the records into the database: 1) Loop through the CSV-records and build an INSERT-batch-statement (batch-statement: multiple INSERT-statements, separated by ; in one String.) To do this properly with SqlParameters is a tiny bit more effort than option 2. 2) Load the CSV-records into a DataTable: Either with DataTable.Load(csvReader) or with csvReader.ReadIntoDataTable() or (since you only need one of the columns) similar to what you do in your current code by looping through the CSV-records and adding DataRows to a DataTable "manually". Then use an SqlDataAdapter to insert the records from the DataTable into the temp table in the database. You would either have to provide the Insert-statement[^] to the SqlDataAdapter yourself (no big deal) or use this "trick": http://stackoverflow.com/a/1631133/4320056[^] (there a DataSet is used instead of a DataTable - just use the DataTable instead). (Prerequisite: adding the Create-Temp-Table-part to your code as described earlier.) Your current code looks alright, except: You should use the SqlCommand and SqlDataReader and probably also the SqlConnection in a using-block. /Sascha

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

[Norris Chappell]

Sascha, Would something like this code work ? I'm really very new to C#. I think option 2 would be more in line with what I could do. Thanks, Noris

DataTable dt = new DataTable();

string line = null;

int i = 0;

using (StreamReader sr = File.OpenText(@"c:\temp\table1.csv"))

{

  while ((line = sr.ReadLine()) != null)

  {

        string\[\] data = line.Split(',');

        if (data.Length > 0)

        {

              if (i == 0)

              {

              foreach (var item in data)

              {

                    dt.Columns.Add(new DataColumn());

              }

              i++;

         }

         DataRow row = dt.NewRow();

         row.ItemArray = data;

         dt.Rows.Add(row);

         }

  }

}

using (SqlConnection cn = new SqlConnection(ConfigurationManager.ConnectionStrings["ConsoleApplication3.Properties.Settings.daasConnectionString"].ConnectionString))

{

  cn.Open();

  using (SqlBulkCopy copy = new SqlBulkCopy(cn))

  {

        copy.ColumnMappings.Add(0, 0);

        copy.ColumnMappings.Add(1, 1);

        copy.ColumnMappings.Add(2, 2);

        copy.ColumnMappings.Add(3, 3);

        copy.ColumnMappings.Add(4, 4);

        copy.DestinationTableName = "Censis";

        copy.WriteToServer(dt);

  }

}

For option 2 this is what I came up with for the SqlDataAdapter part: public static SqlDataAdapter CreateCustomerAdapter( SqlConnection connection) { SqlDataAdapter adapter = new SqlDataAdapter(); // Create the InsertCommand. command = new SqlCommand( "INSERT INTO Tempname(ResourceName) " + "VALUES (@ResourceName)", connection); // Add the parameters for the InsertCommand. command.Parameters.Add("@ResoureName", SqlDbType.NVarChar, 50, "ResourceName"); adapter.InsertCommand = command; return adapter; } I not able to download/integrate the CSV-Reader on this server. I will need to pursuit another route.

[Sascha Lefevre]

Right, SqlBulkCopy would be a third option, but actually I've never worked with it myself. I wrote a method for you which should work for you. You should only have to adjust some minor stuff :)

using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Globalization;
using System.IO;
using System.Windows.Forms;

private static char[] Colon = new char[] { ',' };
private DataTable QueryStaff()
{
const int nameColumnIndex = 1;
const int hoursColumnIndex = 2;

using (var conn = new SqlConnection(ConfigurationManager.ConnectionStrings\["ConsoleApplication3.Properties.Settings.daasConnectionString"\].ConnectionString))
using (var cmd = new SqlCommand("", conn))
using (var dataAdapter = new SqlDataAdapter(cmd))
using (var cmdBuilder = new SqlCommandBuilder(dataAdapter))
{
    // create temporary table in database
    cmd.CommandText = "CREATE TABLE #TempTable(Name nvarchar(100) NOT NULL, Hours decimal(6, 2) NOT NULL);";
    cmd.ExecuteNonQuery();

    // create a DataTable and let the DataAdapter create appropriate columns for it
    DataTable dataTable = new DataTable();
    cmd.CommandText = "SELECT \* FROM #TempTable;";
    dataAdapter.Fill(dataTable);

    // read the CSV-records into the DataTable
    dataTable.BeginLoadData();
    using (StreamReader reader = File.OpenText(@"c:\\temp\\table1.csv"))
    {
        string line;
        if (reader.ReadLine() != null) // skip first line (headers)
        {
            while ((line = reader.ReadLine()) != null)
            {
                string\[\] columns = line.Split(Colon, StringSplitOptions.None);

                DataRow row = dataTable.NewRow();
                row\["Name"\] = columns\[nameColumnIndex\];
                row\["Hours"\] = Decimal.Parse(columns\[hoursColumnIndex\], NumberFormatInfo.InvariantInfo);
                dataTable.Rows.Add(row);
            }
        }
    }
    dataTable.EndLoadData();

    // insert the records from the DataTable into the temporary table
    dataAdapter.Update(dataTable);

    // load the result of the "main purpose" query into the DataTable
    dataTable.Clear();
    cmd.CommandText = "SELECT Tmp.Name, SUM(Tmp.Hours) FROM #TempTable AS Tmp WHERE NOT EXISTS (SELECT \* FROM Stafftracking AS ST WHERE Tmp.Name = ST.Name) GROUP BY Tmp.Name;";
    da

[Norris Chappell]

Sascha, I really appreciate you taking your valuable time to write this method. I will make the adjustments and let you know how it comes out. I was going to be working on this all weekend. I am going to ask my Manager to send me to some C# classes. Thank you again, Norris

[Sascha Lefevre]

Norris Chappell wrote:

I was going to be working on this all weekend.

Maybe invest a part of the time I (hopefully) saved you by investigating how it works and trying to understand things that are new for you :) ... F1, F12 and debugging step by step are your friends ;)

Norris Chappell wrote:

and let you know how it comes out

Yes please do.

Norris Chappell wrote:

I am going to ask my Manager to send me to some C# classes.

You obviously have to know for yourself but if you'd ask me, I'd say let him give you the money to buy some good books and some time to work them through. More than one book because one may explain something in a way that's better understandable than the other and vice versa. If then still something is unclear, Google is the next step. And if you can't find the answer with Google, you could ask here. cheers, Sascha edit: Just realized there's a small flaw in my code because it's not 100% the same as the version I tested. But I'm sure you can fix it :)

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

[Norris Chappell]

Here is my code and it still don't work?

using System;
using System.Configuration;
using System.Data;
using System.IO;
using System.Data.Common;
using System.Data.SqlClient;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Globalization;

namespace StaffingWebParts.VisualWebPart1
{
public partial class VisualWebPart1UserControl : UserControl
{
private static char[] Colon = new char[] { ',' };
private DataTable QueryStaff()
{
const int nameColumnIndex = 1;
const int hoursColumnIndex = 2;

        using (var conn = new SqlConnection(ConfigurationManager.ConnectionStrings\["SQLStaffingConn"\].ConnectionString))
        using (var cmd = new SqlCommand("", conn))
        using (var dataAdapter = new SqlDataAdapter(cmd))
        using (var cmdBuilder = new SqlCommandBuilder(dataAdapter))
        {
            // create temporary table in database
            //cmd.CommandText = "CREATE TABLE #TempTable(Name nvarchar(100) NOT NULL, Hours decimal(6, 2) NOT NULL);";
            // cmd.ExecuteNonQuery();

            // create a DataTable and let the DataAdapter create appropriate columns for it
            DataTable dataTable = new DataTable();
            cmd.CommandText = "SELECT \* FROM TempTable;";
            dataAdapter.Fill(dataTable);

            // read the CSV-records into the DataTable
            dataTable.BeginLoadData();
            using (StreamReader reader = File.OpenText(@"c:\\Users\\pzd74f\\Downloads\\FinalLabor2015.csv"))
            {
                string line;
                if (reader.ReadLine() != null) // skip first line (headers)
                {
                    while ((line = reader.ReadLine()) != null)
                    {
                        string\[\] columns = line.Split(Colon, StringSplitOptions.None);

                        DataRow row = dataTable.NewRow();
                        row\["Name"\] = columns\[nameColumnIndex\];
                        row\["Hours"\] = Decimal.Parse(columns\[hoursColumnIndex\], NumberFormatInfo.InvariantInfo);
                        dataTable.Rows.Add(row);
                        
                    }
                    
                }
            }
            dataTable.EndLoadData();
            
            // insert the records fr

[Sascha Lefevre]

Take a look at the very first code you posted. I don't know to which method it belonged as you didn't include the "method head". At the end you had these lines:

gvDataCenterLabor.DataSource = dt;
gvDataCenterLabor.DataBind();

Supposedly in the same method you would now remove all the code you originally posted and just write instead:

gvDataCenterLabor.DataSource = QueryStaff();
gvDataCenterLabor.DataBind();

dt was the variable for the DataTable you originally created. Now QueryStaff() returns "that" DataTable. Please verify that const int hoursColumnIndex = 2; is correct for you (I think it's not). In the CSV you originally posted, the hours were in the last column. For my testing purposes I created a CSV with just 3 columns and the hours were in the last of it, so index 2 for me.

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

[Norris Chappell]

You are correct it should be gvNewResource.DataSourse = QueryStaff(); gvNewResource,Databind(); Yes the Name is in column 2 which is 1 and hours is on column 10 which is 9.

[Sascha Lefevre]

Just spotted: Seems like you haven't yet adjusted the column names in the last query. Please tell if it works then.

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

[Norris Chappell]

Here is my code that I changed. It doesn't even so me anything when I set breakpoints.

using System;
using System.Configuration;
using System.Data;
using System.IO;
using System.Data.Common;
using System.Data.SqlClient;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Globalization;

namespace StaffingWebParts.VisualWebPart1
{
public partial class VisualWebPart1UserControl : UserControl
{
private static char[] Colon = new char[] { ',' };
private DataTable QueryStaff()
{
const int nameColumnIndex = 1;
const int hoursColumnIndex = 9;

        using (var conn = new SqlConnection(ConfigurationManager.ConnectionStrings\["SQLStaffingConn"\].ConnectionString))
        using (var cmd = new SqlCommand("", conn))
        using (var dataAdapter = new SqlDataAdapter(cmd))
        using (var cmdBuilder = new SqlCommandBuilder(dataAdapter))
        {
            // create temporary table in database
            //cmd.CommandText = "CREATE TABLE #TempTable(Name nvarchar(100) NOT NULL, Hours decimal(6, 2) NOT NULL);";
            // cmd.ExecuteNonQuery();

            // create a DataTable and let the DataAdapter create appropriate columns for it
            DataTable dataTable = new DataTable();
            cmd.CommandText = "SELECT \* FROM TempTable;";
            dataAdapter.Fill(dataTable);

            // read the CSV-records into the DataTable
            dataTable.BeginLoadData();
            using (StreamReader reader = File.OpenText(@"c:\\Users\\pzd74f\\Downloads\\TestLabor2015.csv"))
            {
                string line;
                if (reader.ReadLine() != null) // skip first line (headers)
                {
                    while ((line = reader.ReadLine()) != null)
                    {
                        string\[\] columns = line.Split(Colon, StringSplitOptions.None);

                        DataRow row = dataTable.NewRow();
                        row\["Name"\] = columns\[nameColumnIndex\];
                        row\["Hours"\] = Decimal.Parse(columns\[hoursColumnIndex\], NumberFormatInfo.InvariantInfo);
                        dataTable.Rows.Add(row);
                        
                    }
                    
                }
            }
            dataTable.EndLoadData();

[Norris Chappell]

I changed the hours to 9 the name is 1.

[Norris Chappell]

Sascha, It is still not working for me. Norris

[Sascha Lefevre]

1. I just forgot to remove the line using System.Windows.Forms; - you don't need it. 2) Seems like you haven't yet adjusted the column names in the last query. The reason why you don't get an exception because of that and why nothing happens at all is: 3) I'm pretty sure the method isn't called anywhere. These lines:

gvNewResource.DataSource = QueryStaff();
gvNewResource.DataBind();

aren't supposed to be in QueryStaff(). At the moment it's a snake that bites its own tail - you "try" to call QueryStaff() from within itself but it's not called from anywhere "outside". The method that contained your original code is probably the place where you should move these two lines into (as I've already written in my second-last reply or so ;P ) or just into any method that is actually triggered by something (maybe a button-click).

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

[Norris Chappell]

Okay I am confused. I'm suppose to put this method in my other code. I am in a loop now when I add this to my code. protected void Page_Load(object sender, EventArgs e) { if (!this.IsPostBack) { } }

[Norris Chappell]

Okay it is now working. Finally. However I need to work on the hours. Which I can do. Let me show you my final code.

using System;
using System.Configuration;
using System.Data;
using System.IO;
using System.Data.Common;
using System.Data.SqlClient;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Globalization;

namespace StaffingWebParts.VisualWebPart1
{
public partial class VisualWebPart1UserControl : UserControl
{
protected void Page_Load(object sender, EventArgs e)
{

        if (!Page.IsPostBack)
        {
            this.QueryStaff();
            gvNewResource.DataSource = QueryStaff();
            gvNewResource.DataBind();
                       
        }
    }
 
    private static char\[\] Colon = new char\[\] { ',' };
    private DataTable QueryStaff()
    {
        const int nameColumnIndex = 1;
        const int hoursColumnIndex = 9;

        using (var conn = new SqlConnection(ConfigurationManager.ConnectionStrings\["SQLStaffingConn"\].ConnectionString))
        using (var cmd = new SqlCommand("", conn))
        using (var dataAdapter = new SqlDataAdapter(cmd))
        using (var cmdBuilder = new SqlCommandBuilder(dataAdapter))
        {
            // create temporary table in database
            //cmd.CommandText = "CREATE TABLE #TempTable(Name nvarchar(100) NOT NULL, Hours decimal(6, 2) NOT NULL);";
            // cmd.ExecuteNonQuery();

            // create a DataTable and let the DataAdapter create appropriate columns for it
            DataTable dataTable = new DataTable();
            cmd.CommandText = "SELECT \* FROM TempTable;";
            dataAdapter.Fill(dataTable);

            // read the CSV-records into the DataTable
            dataTable.BeginLoadData();
        
            using (StreamReader reader = File.OpenText(@"c:\\Users\\pzd74f\\Downloads\\TestLabor2015.csv"))
            {
                string line;
                if (reader.ReadLine() != null) // skip first line (headers)
                {
                    while ((line = reader.ReadLine()) != null)
                    {
                        string\[\] columns = line.Split(Colon, StringSplitOptions.None);

                        DataRow row = dataTable.NewRow();
                        row\["Name"\] = columns\[nam

[Sascha Lefevre]

I'm sorry I can't help you with ASP.NET, I have next to no experience with that. But. If your original code, wherever it was, was executed (even though it didn't do what it should), then this should work when you remove these two lines from QueryStaff() and insert them where your original code was.

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

[Sascha Lefevre]

Alright, one step further :) You can remove this line: this.QueryStaff(); In which way does the Hours-Stuff not work as expected yet?

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

[Norris Chappell]

It's not showing the hours. Just the name. The table has the hours but the sum in not working.

[Norris Chappell]

No problem with asp.net. I took this project over from a person who left to go to another project and division. Java/C++/Oracle programming is what I did in the past. So I am very new to C#.

[Sascha Lefevre]

Please re-enable the code for the temporary table so that we can rule out that there's something wrong with your replacement by a permanent table: - two lines have to be un-commented - in the two query-strings put a # in front of "TempTable" -> #TempTable - delete or rename the permanent table "TempTable" in the database Unrelated: You can remove the line conn.Close(); , it happens automatically because of the using-statement.

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson