Databases
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POHow to insert into a Service-based Database
 

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  1. POHow to insert into a Service-based Database
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    <pre><code>public partial class Form1 : Form { SqlConnection cn = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\Dimmer\Documents\Visual Studio 2013\Projects\Manage components\Manage components\Database1.mdf;Integrated Security=True"); SqlCommand cmd = new SqlCommand(); SqlDataReader dr; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { cmd.Connection = cn; loadlist(); } private void button1_Click(object sender, EventArgs e) { if (txtid.Text != "" &amp; txtname.Text != "") { cn.Open(); cmd.CommandText = "insert into info (id,name) values ('"+txtid.Text+"'.'"+txtname.Text+"')"; cmd.ExecuteNonQuery(); cmd.Clone(); MessageBox.Show("Record instered!"); txtid.Text = ""; txtname.Text = ""; loadlist(); } } } </code></pre> <p>I am new to C# and I have been trying for some hours with a insert code to a service-based database. I have tested the connection to it and it works.</p> <p>I got this error message: </p> <blockquote> <p>An unhandled exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll</p> <p>Additional information: Incorrect syntax near 'xxxx'. </p> </blockquote> <p>Where <code>xxxx</code> is what I insert into my 2nd textbox. The code stops at </p> <pre><code>cmd.ExcecuteNonQuery(); </code></pre> <p>I have been searching for an answers for hours, I believe there is something wrong with the database.</p> <p>Sorry if this code looks ugly, but I had some problems with spaces :P</p>
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    1. COWhat are the values of `txtid.Text` and `txtname.Text` exactly? And you should always use parameterized queries. This kind of string concatenations are open for _SQL Injection_ attakcs.
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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