textboxes populate ontextchanged

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I need a sample of code that will allow me to type a name in a text box and on change of the text box if record exist populate information from my database into text boxes.

sample code please, please, please

thanks ahead of time.

Posted 19-Oct-10 10:24am

postonoh

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2 solutions

Solution 2

You need to research on c# filtering dataset or c# filtering datatable to find out how to get the right records.

You should also look up c# parameterized queries for the correct/safe way to do it.

Posted 19-Oct-10 12:28pm

Henry Minute

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Heinzzy · Accepted Answer · 2010-10-19T12:26:00

Every time you enter correct employee name textbox1 and textbox2 shows his additional information.

DataSet ds;        
        private void Form1_Load(object sender, EventArgs e)
        {
            ds = new DataSet();
            DataAdapter da = new SqlDataAdapter(@"SELECT * FROM Personel", @"Data Source=HEINZZ-PC\SQLEXPRESS;Initial Catalog=MyDB;Integrated Security=True");
            da.Fill(ds);
            this.dataGridView1.DataSource = ds.Tables[0];          
        }        

        private void comboBox1_TextChanged(object sender, EventArgs e)
        {
            string text = ((ComboBox)sender).Text;
            IEnumerable<DataRow> query =
                from employee in ds.Tables[0].AsEnumerable()
                where (employee["Name"]).ToString().Trim() == text
                select employee;
            if (query.Count() != 0)
            {
                this.textBox1.Text = query.First()["ID"].ToString();
                this.textBox2.Text = query.First()["Age"].ToString();
            }
        }

This is one of the ways to make it. If you use a combobox with datasource it will prompt user to the right name.

private void Form1_Load(object sender, EventArgs e)
        {
            DataSet ds = new DataSet();
            DataAdapter da = new SqlDataAdapter(@"SELECT * FROM Personel", @"Data Source=HEINZZ-PC\SQLEXPRESS;Initial Catalog=MyDB;Integrated Security=True");
            da.Fill(ds);
            this.dataGridView1.DataSource = ds.Tables[0];
            
            this.comboBox1.DataSource = ds.Tables[0];
            this.comboBox1.DisplayMember = "Name";
            
            this.comboBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
            this.comboBox1.AutoCompleteSource = AutoCompleteSource.ListItems;
        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            this.textBox1.Text = ((DataRowView)(this.comboBox1.SelectedItem))["ID"].ToString();
            this.textBox2.Text = ((DataRowView)(this.comboBox1.SelectedItem))["Age"].ToString();
        }