SQLCommand for selecting value in the same row but different column

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Hello guys, I have got this code below which should on SQLCommand Select column pocsed from table busnaz, and select the value of pocsed which is in the same row as selected value of combobox(which is in column nazev). And insert this value into textbox klimax.

I hope someone will help me find the error, thanks!

C#

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {


            try
            {
                SqlCommand novahodnota = new SqlCommand("...", spojeni);
                spojeni.Open();
                SqlDataReader precti = novahodnota.ExecuteReader();

                precti.Read();
                zname.Text = precti.GetDecimal(2).ToString();
                spojeni.Close();
                
            }
            catch (Exception ex)
            {
                //something
            }
        }

Posted 9-Jul-13 3:57am

mareksip

Updated 15-Oct-13 4:23am

v3

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Comments

[no name] 9-Jul-13 10:04am

What error? Where is "@selecteditem" defined?

ZurdoDev 9-Jul-13 10:12am

Sorry, I can't follow what you need. It seems like it should be easy but I can't understand you. If you want a different column just do precti[columnName]

saguptamca 9-Jul-13 10:16am

Not clear at all

2 solutions

Solution 2

Considering your SELECT is only returning one column, your call to GetDecimal(2) is assuming that there is at least 3 columns being returned, numbered 0, 1 and 2. You're trying to return a value from a column that doesn't exist in the resultset.

Posted 9-Jul-13 4:13am

Dave Kreskowiak

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Jan Lehmkuhl · Accepted Answer · 2013-07-09T04:11:00

Solution 1

I am not 100% sure on this, but I would change SqlCommond to:

"SELECT pocsed FROM busnaz WHERE nazev=" + comboBox1.SelectedIndex But I am not sure what nazev is?

else ComboBox1.SelectedValue?

Posted 9-Jul-13 4:11am

Jan Lehmkuhl

Comments

Dave Kreskowiak 9-Jul-13 10:55am

That returns a different row, not the value of a different column.

Jan Lehmkuhl 9-Jul-13 11:24am

Hi Dave - no it doesn't necessarily, because I don't know the layout of the table. I believe nazev could be index... so if index remains the same as that selected in the combobox then item remains the same? He did not specify the error, but the "@selectedItem" seemed out of place. But as I said I am not 100% sure cause I did not know the exact error/ datatable

Dave Kreskowiak 9-Jul-13 11:36am

Yea, I'm just going by the title of the post and what the code says...