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Urgent data adapter not saving data

Posted on 2004-10-16
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Last Modified: 2010-04-15
Hello experts.  I am loading in a table with 300 stocks, then poulating the table with the latest data from another table.  

I have checked the dataGrid and the changes to the dataTable in C# code is flawless.

The problem here is the data adapter is not updating all the rows. In fact, it is only updating half of the rows, leaving half empty. I dont know how to solve this.

Any recommendations on how the get the dataset to save the sql server would be greatly appreciated!

Thanks


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

namespace Stocktable
{

      public class Form1 : System.Windows.Forms.Form
      {
            public DataSet virtualDatabase;
            public SqlConnection cnDatabase;
            public string cnString;
            public System.Data.SqlClient.SqlDataAdapter da_tblStocks;
            public System.Data.SqlClient.SqlDataAdapter da_tblStockPrices;
            public SqlCommandBuilder cb_tblStocks;
            public SqlCommandBuilder cb_tblStockPrices;
            public DataTable tblStocks;
            public DataTable tblStockPrices;
            public DataRow drStock;
            public DataRow drStockPrice;
            private System.Windows.Forms.DataGrid dataGrid1;
            private System.Windows.Forms.Button button1;

            private System.ComponentModel.Container components = null;

            public Form1()
            {
                  InitializeComponent();
                  virtualDatabase = new DataSet();
                  cnString = "workstation id=HISTDB;packet size=4096;integrated security=SSPI;data source=\"HIST" +
                        "DB\\STOCKDATABASE\";persist security info=True;initial catalog=DB1";
                  cnDatabase = new SqlConnection(cnString);
                  cnDatabase.Open();
                  da_tblStocks = new SqlDataAdapter("SELECT * from tblStocks", cnDatabase);
                  da_tblStocks.Fill(virtualDatabase, "tblStocks");
                  cb_tblStocks = new SqlCommandBuilder(da_tblStocks);
                  tblStocks = virtualDatabase.Tables["tblStocks"];

                  da_tblStockPrices = new SqlDataAdapter("SELECT * from tblStockPrice", cnDatabase);
                  da_tblStockPrices.Fill(virtualDatabase, "tblStockPrices");
                  cb_tblStockPrices = new SqlCommandBuilder(da_tblStockPrices);
                  tblStockPrices = virtualDatabase.Tables["tblStockPrices"];
      
                  dataGrid1.DataSource = tblStocks.DefaultView;
            }

            protected override void Dispose( bool disposing )
            {
                  if( disposing )
                  {
                        if (components != null)
                        {
                              components.Dispose();
                        }
                  }
                  base.Dispose( disposing );
            }

            #region Windows Form Designer generated code

            private void InitializeComponent()
            {
                  this.dataGrid1 = new System.Windows.Forms.DataGrid();
                  this.button1 = new System.Windows.Forms.Button();
                  ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
                  this.SuspendLayout();
                  //
                  // dataGrid1
                  //
                  this.dataGrid1.DataMember = "";
                  this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
                  this.dataGrid1.Location = new System.Drawing.Point(8, 64);
                  this.dataGrid1.Name = "dataGrid1";
                  this.dataGrid1.Size = new System.Drawing.Size(600, 392);
                  this.dataGrid1.TabIndex = 0;
                  //
                  // button1
                  //
                  this.button1.Location = new System.Drawing.Point(8, 8);
                  this.button1.Name = "button1";
                  this.button1.Size = new System.Drawing.Size(128, 40);
                  this.button1.TabIndex = 1;
                  this.button1.Text = "Update";
                  this.button1.Click += new System.EventHandler(this.button1_Click);
                  //
                  // Form1
                  //
                  this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
                  this.ClientSize = new System.Drawing.Size(720, 461);
                  this.Controls.Add(this.button1);
                  this.Controls.Add(this.dataGrid1);
                  this.Name = "Form1";
                  this.Text = "Form1";
                  this.Load += new System.EventHandler(this.Form1_Load);
                  ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
                  this.ResumeLayout(false);

            }
            #endregion

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

            private void Form1_Load(object sender, System.EventArgs e)
            {
                  DataRow[] draStocks = tblStocks.Select("stock_id > 0", "symbol");
                  DataRow[] draStockPrices;
                  DataRow[] draTemp;
                  DataRow drTemp;
                  foreach (DataRow drStock in draStocks)
                  {
                        draStockPrices = tblStockPrices.Select("stock_id = " + drStock["stock_id"] + " and s_date <= #10-5-04#", "s_date DESC");
                        drStockPrice = (DataRow)draStockPrices.GetValue(0);
                        drStock["s_open"] = convert(drStockPrice["s_open"]);
                        drStock["s_high"] = convert(drStockPrice["s_high"]);
                        drStock["s_low"] = convert(drStockPrice["s_low"]);
                        drStock["s_close"] = convert(drStockPrice["s_close"]);
                  }

            }
            private double convert(object column)
            {
                  if (column == System.DBNull.Value)
                  {
                        return 0;
                  }
                  else
                  {
                        return System.Convert.ToDouble(column);
                  }

            }

            private void button1_Click(object sender, System.EventArgs e)
            {
                        this.virtualDatabase.AcceptChanges();
                        this.da_tblStocks.Update(virtualDatabase, "tblStocks");      
            }


      }
}
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Question by:OptionsMM
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3 Comments
 
LVL 6

Accepted Solution

by:
ryerras earned 2000 total points
ID: 12329608
May be this is the code block that is causing the weird behaviour

private void button1_Click(object sender, System.EventArgs e)
          {
                    this.virtualDatabase.AcceptChanges();
                    this.da_tblStocks.Update(virtualDatabase, "tblStocks");    
          }


put   --this.virtualDatabase.AcceptChanges();-- after the Update like below

private void button1_Click(object sender, System.EventArgs e)
          {
                  this.da_tblStocks.Update(virtualDatabase, "tblStocks");    
                  this.virtualDatabase.AcceptChanges();
          }
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