C# update

Posted on 2014-04-11
Medium Priority
Last Modified: 2014-04-14
Hi guys ,

I'm trying to update just one column and I got error see screenshot (app) and also see attachment of my table.

here is my code:

string Query = "update rmsmasterdbtest.dbo.serial set serialnumber='" + this.txtsn.Text + "' ,serialnumber3='" + this.txtstatus + "' where serialnumber='" + this.txtsn.Text + "' ;";

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Question by:Moti Mashiah
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LVL 52

Accepted Solution

Carl Tawn earned 2000 total points
ID: 39994409
I suspect this:

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Should say:

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Otherwise it will spit out the object type information, which will exceed the 10 characters that your field will accept.

Author Comment

by:Moti Mashiah
ID: 39994456
that's is right carl thank you very much and also I just figured that I forgot to add the Reader in my code now all work fine:

Carl , it seems that any time I'm trying to update I got some issue I think that I'm not really understand the concept updating database columns can you give my some explanation also I would like to now what is the difference between these two update methods

string Query = "update RMSCRM.dbo.sales set Status=@Status, note=@note where ID=@id";

            SqlConnection Myconn = new SqlConnection(conn);
            SqlCommand cmd = new SqlCommand(Query, Myconn);

            int SalesID = int.Parse(this.txtid.Text);

            cmd.Parameters.AddWithValue("@id", SalesID);
            cmd.Parameters.AddWithValue("@status", this.txtStatus.Text);
            cmd.Parameters.AddWithValue("@note", this.txtNote.Text);

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string Query = "update rmsmasterdbtest.dbo.serial set serialnumber='" + this.txtsn.Text + "' ,serialnumber3='" + this.txtstatus.Text + "' where serialnumber='" + this.txtsn.Text + "' ;";

            SqlConnection Myconn = new SqlConnection(conn);
            SqlCommand cmd = new SqlCommand(Query, Myconn);
            SqlDataReader Reader;

                Reader = cmd.ExecuteReader();
                MessageBox.Show("Updated Status");
                while (Reader.Read())


Thank you soo much

Author Comment

by:Moti Mashiah
ID: 39994534
I read some material but still get complicated when I'm trying to write update code.

Author Comment

by:Moti Mashiah
ID: 39999819
I've requested that this question be closed as follows:

Accepted answer: 0 points for motimash's comment #a39994534
Assisted answer: 500 points for carl_tawn's comment #a39994409

for the following reason:


Author Closing Comment

by:Moti Mashiah
ID: 39999820
Excellent as usual

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