mysql - C# INSERT TO access database creates 2 database entries rather than 1 -

-

I have created a C # program to the data in an Access database combined with some well-known address.

Every time I code runs, I, I get two entries in the database 

  namespace quotes {public partial class quote form: Form {private OleDbConnection quotescon; Private OLEDB Commands OLDBCMD = New OLEDB Commands (); Private String Connect = @ "Provider = Microsoft.Jet.OlDD.4.0; Data Source = H: \ Excerpt. MDB; Continue Security Information = Wrong"; Public Quotation Form () {QuotesCon = New AllBackNation (Connect); InitializeComponent (); } Private void btn_insert_Click (object sender, EventArgs e) {int quote = Convert.ToInt32 (txtb_Quotenumber.Text); Quotescon.Open (); Oledbcmd.Connection = quotescon; Oledbcmd.CommandText = "Insert Table 1 ([citation counts], account, made, accepted) values ​​( '+ Quotes +' ','" + this.txtb_name.Text + " ','" + this.date_created. Text + "','" + This.comboBox1.Text + "');"; Oledbcmd.ExecuteNonQuery (); Int temp = oledbcmd.ExecuteNonQuery (); If (floating gt; 0) {txtb_Quotenumber.Text = null; Txtb_name.Text = null; MessageBox.Show ("The entry has been successfully added to the database", "Data added", MessageBoxButtons.OK, MessageBoxIcon.Information); } Other {message box. Show ("The data entry has not been successfully added, please try again", "Failed to add data", message box button. OK, messagebox icon. Error); } CotesCon. Stop it (); }

Because you execute your command twice.

oledbcmd.ExecuteNonQuery ();

and another 

  int temp = oledbcmd.ExecuteNonQuery ();

Just delete the first. A Transact-SQL statement affects the number of connections and rows against

execution .

But more importantly, you should use Always . String consensation of this type is open for attack.

And your OleDbConnection and OleDbCommand . 

  is to use (OleDbConnection quotes = new OleDbConnection (Connect using)) (OleDbCommand oledbcmd = con.CreateCommand ()) {oledbcmd.CommandText = @ "Insert Table 1 (Using [quote number], account, med, accepted) value (?,?,?,?) "; Oledbcmd.Parameters.AddWithValue ("number", quote); Oledbcmd.Parameters.AddWithValue ("@Account", this.txtb_name.Text); Oledbcmd.Parameters.AddWithValue ("Created", this.date_created.Text); Oledbcmd.Parameters.AddWithValue ("Approved", this.comboBox1.Text); Int temp = oledbcmd.ExecuteNonQuery (); If (floating gt; 0) {txtb_Quotenumber.Text = null; Txtb_name.Text = null; MessageBox.Show ("The entry has been successfully added to the database", "Data added", MessageBoxButtons.OK, MessageBoxIcon.Information); } Other {message box. Show ("The data entry has not been successfully added, please try again", "Failed to add data", message box button. OK, messagebox icon. Error); }}

Comments

Post a Comment

Popular posts from this blog

winforms - C# Form - Property Change -

-
I have a form that has a property named car A class with many properties. The Properties is being displayed on the current car on the basis of some user actions that are being displayed. So I have to know whether the property has been allocated or set to zero. I'm aware of INotifyPropertyChanged , but in my case I'm not sure that since this change I have changed my car properties car do not want to monitor the property. Any idea how to accomplish this? In advance thank you If you have created a true asset in your class then You should be a great and setter, you can add the code directly to the form property in order to take action on the basis of "form": Public partial category Form 1: form {public form 1 () {InitializeComponent (); } // define car square public class car {public string name = string. Empty; } // private car to keep the value of the current car private variable _car = null; // Property of public form which you can ru...
Read more

java - Messages from .properties file do not display UTF-8 characters -

-
Image
In the form of a title, I can only add that if I enter the html file manually, then it Okay. View Rolver: & lt; Bean id = "templorellolver" class = "org.thymeleaf.templateresolver.ServletContextTemplateResolver" & gt; & Lt; Property name = "prefix" value = "/ web-nf / templates" /> & Lt; Property name = "suffix" value = ". Html" /> & Lt; Property Name = "Template Mode" Value = "HTML5" /> & Lt; Asset name = "cacheable" value = "wrong" /> & Lt; Property Name = "characterEncoding" value = "UTF-8" /> & Lt; / Bean & gt; & Lt; Bean id = "Template Engine" class = "org.thymeleaf.spring3.SpringTemplateEngine" & gt; & Lt; Property Name = "Temploreolar" ref = "Templarolver" /> & Lt; / Bean & gt; & Lt; Bean square = "org.thymeleaf.spring3.view.Thymel...
Read more

javascript - amcharts makechart not working -

-
I am trying to create an amiratars serial chart on my Durandal single page application. This chart was working fine on Chrome browser but it is not working on IE. Can you please help me in this regard. Error while using Amcharts. The Macchart () method does not support the object in this object in IE.
Read more