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

[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

[Norris Chappell]

I'm getting this error: ExecuteNonQuery requires an open and available Connection. The connection's current state is closed.

[Sascha Lefevre]

Yep, that's what I mentioned, what I forgot in the posted version of my code, because the code I tested was slightly different and didn't require explicit handling of this. You can fix this, right? ;)

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

[Norris Chappell]

So I will need to code an opening of the database and available connection since it closed?

[Norris Chappell]

If that is the case why didn't I need to have it when I did the select on the "where not exists" query?

[Sascha Lefevre]

Between the opening brace and the following comment "// create temporary table in database" insert a conn.Open();

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

[Norris Chappell]

One more thing My perm table is called TempTable maybe I should create the temp table with a different name?

[Sascha Lefevre]

Norris Chappell wrote:

If that is the case why didn't I need to have it when I did the select on the "where not exists" query?

What do you mean by "it" here?

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

[Norris Chappell]

Okay didn't get the error. However, I don't see the table in SQL Server?

[Norris Chappell]

I tried to query it and got an error?

[Sascha Lefevre]

Quote:

If that is the case why didn't I need to have it when I did the select on the "where not exists" query?

Sorry, I'm tired - now I think I understood what you meant: The DataAdapter on this line: dataAdapter.Fill(dataTable); opens the connection automatically if it isn't already, but cmd.ExecuteNonQuery(); doesn't, so after un-commenting that line it became neccessary to open the connection explicitly.

Quote:

One more thing My perm table is called TempTable maybe I should create the temp table with a different name?

I think you're tired too ;) Yes, you should have renamed or deleted the perm table. (I actually don't know if it would be a problem, I just told you to do that to avoid a potential error.)

Quote:

Okay didn't get the error. However, I don't see the table in SQL Server?

It's a temporary table. It exists only during the lifetime of the connection and is only visible to that connection.

Quote:

I tried to query it and got an error?

Always tell the exact error message when you're trying to get help :)

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

[Norris Chappell]

Sorry again. You are right I am tired too. I think I am good for now. I can figure out the hours issue. You have been so helpful and I have learn a lot from you. Thank you for being so patience with me. What time zone are you in? Are you from France?

[Sascha Lefevre]

You're welcome! But if you can't figure out the hours issue, feel free to ask. I'm from Germany, one of my ancestors came from France :) Good luck and good night! cheers, Sascha

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

[Norris Chappell]

I need to replace: using (StreamReader reader = File.OpenText(@"c:\Users\pzd74f\Downloads\TestLabor2015.csv")) with something like this: protected void ImportButton_Click(object sender, EventArgs e) { if (this.FileUpload1.HasFile) { var extension = Path.GetExtension(FileUpload1.FileName); if (extension == ".csv") { StreamReader csvreader = new StreamReader(FileUpload1.FileContent); I need to have the user to be able to import the file instead of the csv be hardcoded.

[Sascha Lefevre]

Just pass FileUpload1.FileContent as an argument to QueryStaff :)

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