displayed selected data in textbox ?

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hello every one ,
i have done a windows form which contains two textboxes , first has the word , and the second should has the meaning of that word .
i have a button , when it is clicked it will but the meaning in textbox2 with respect to the word in textbox1 , but i does not perform ?? the error is : Child list for field audio1 cannot be created.

i have used sqlserver & visual studio 2010

this is my code :

C#

private void btntranslate_Click_1(object sender, EventArgs e)
{
    if (textBox1.Text == " ")
    {
        MessageBox.Show(" There is no word to translated! ");
    }
    else
    {
        string constring = "Data Source=.;Initial Catalog=speakerpro;Integrated Security=True";
        string concom= "select mean from [audio1] where word = ' " + textBox1.Text + " ' ;";
        SqlConnection con = new SqlConnection(constring);
        
        SqlCommand com = new SqlCommand(concom , con);
        SqlDataAdapter adp = new SqlDataAdapter();
        DataTable dt = new DataTable();
        con.Open();
        adp.SelectCommand = com;
        adp.Fill(dt);
        textBox2.DataBindings.Add("Text", dt , "audio1.mean");
        SqlDataReader dr = com.ExecuteReader();
        con.Close();
    }
}

is there any problem in my code ??? guide me ,please

[Edit member="Tadit"]
Corrected formatting issues.
Added pre tags.
[/Edit]

Posted 30-Jun-14 4:12am

Me is Needer

Updated 30-Jun-14 4:17am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v3

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2014-06-30T04:39:00

Solution 1

Problems, which I can see

Use paramterized Query instead of inline Queries to avoid SQLInjection attack. More at - could not open sql server connection[^]
No need to open or close the Connection while using SqlDataAdapter. SqlDataAdapter does these automatically for you.
You have declared a SqlDataReader at last, which is not needed at all.

Posted 30-Jun-14 4:39am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

Me is Needer 30-Jun-14 16:28pm

thanks for u , but i also face the same problem :( ?? why !

Dilan Shaminda · Answer 2 · 2014-06-30T16:03:00

C#

private DataTable getmeaning(text1)
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("mean", typeof(string));


            if (conn.State.ToString() == "Closed")
            {
                conn.Open();
            }

            SqlCommand newCmd = conn.CreateCommand();
            newCmd.Connection = conn;
            newCmd.CommandType = CommandType.Text;
            newCmd.CommandText = "select mean from [audio1] where word = ' " + text1 + " ' ;";

            SqlDataReader dr = newCmd.ExecuteReader();
            while (dr.Read())
            {

                dt.Rows.Add(dr["mean"]);
            }
            conn.Close();

            return dt;
        }

then call the method like this....

C#

DataTable dt = getmeaning(textBox1.Text);
if(dt.Rows.Count > 0)
{
DataView dv = new DataView(dt);
textBox2.Text = dv[0]["mean"].ToString();
}

damodara naidu betha · Answer 3 · 2014-07-01T02:30:00

Solution 3

C#

Try 

textBox2.DataBindings.Add("Text",dt,"mean");

Posted 1-Jul-14 2:30am

damodara naidu betha

Binu1985 · Answer 4 · 2014-07-01T02:49:00

Solution 4

just change the code line

textBox2.DataBindings.Add("Text", dt , "audio1.mean");

to

textBox2.Text= dt.Rows[0]["mean"].ToString();

Posted 1-Jul-14 2:49am

Binu1985