Alter Table in C#.Net 4.0

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Hi, I have one window form with one textbox1 and button1, Here I m adding new column to the Table Employee, and The column name should be the textbox.text name.

private void button1_Click(object sender, EventArgs e)
{
 string strConn = @"Password=Admin123;Persist Security Info=True;User ID=sa;Initial Catalog=Employee;Data Source=NAVUY-24B";
 SqlConnection conn = new SqlConnection(strConn);
 conn.Open();
SqlCommand sqlCmd = new SqlCommand("alter table Employee ADD '" + textBox1.Text + "' varchar(50)", conn);
sqlCmd.ExecuteNonQuery();
}

its not working
Incorrect syntax near at textbox......

pls any one help me...
thanks in advance

Posted 13-Jun-11 21:42pm

sindhu s

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Christian Graus · Answer 1 · 2011-06-13T21:45:00

Obviously your code is terrible. I expect this is just an experiment and that you'll learn to write good code later. In general, what you're doing is a bad idea, too, because why would you write code that adds columns at random ?

What you should do, is grab the text you're generating, paste it in to SQL Server Management tools, and see what error message you get when you try to run it. Then you can work out how to fix your SQL. I don't believe that a column name goes in quotes, however ( assuming the rest of your SQL is correct, which I am not sure of )

vrushali katkade · Answer 2 · 2011-06-13T21:57:00

Solution 2

SqlCommand sqlCmd = new SqlCommand("alter table Employee ADD " + textBox1.Text + "; varchar(50)", conn);
remove the single quot of the text box

Posted 13-Jun-11 21:57pm

vrushali katkade

Comments

Christian Graus 14-Jun-11 4:00am

Thanks for explaining that, my response was obviously not clear.....

sindhu s 14-Jun-11 4:32am

thanku... its working fine....