i think i need a loop but how?

fergus

hi there,

i have managed to pull in data from my sql table into my asp.net page. i am only getting one row. how can i get all rows to display that are containg in the table.

i have this so far:


                myCon.Open();
                string qry2 = "select client_ref, crosk_ref, client_name, section_name from md_overall_temp where client_code='" + lblRefNum.Text + "'";
                SqlCommand cmd2 = new SqlCommand(qry2, myCon);
                SqlDataAdapter adapter2 = new SqlDataAdapter(cmd2);
                DataTable dt2 = new DataTable();
                adapter2.Fill(dt2);
                if (dt2.Rows.Count > 0)
                {
                    string clientRef = dt2.Rows[3]["Client_ref"].ToString();
                    CLIENTREF.Text = clientRef;
                    string croskRef = dt2.Rows[3]["Crosk_ref"].ToString();
                    CROSKREF.Text = croskRef;
                    string clientName  = dt2.Rows[3]["Client_name"].ToString();
                    CLIENTNAME.Text = clientName;
                    string section_name = dt2.Rows[3]["Section_name"].ToString();
                    SECTIONNAME.Text = section_name;
                }
                else
                {
                    CLIENTREF.Text = "No record found!";
                }
                myCon.Close();

5 Replies

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Tuhin Paul2y ago

Accepted answer

you can definitely stop the resulting output from being one lump of text and assign it to separate labels for better organization.

myCon.Open();
string qry2 = "SELECT client_ref, crosk_ref, client_name, section_name FROM md_overall_temp WHERE client_code='" + lblRefNum.Text + "'";
SqlCommand cmd2 = new SqlCommand(qry2, myCon);
SqlDataAdapter adapter2 = new SqlDataAdapter(cmd2);
DataTable dt2 = new DataTable();
adapter2.Fill(dt2);
myCon.Close();

if (dt2.Rows.Count > 0)
{
  // No need for StringBuilder here, use string concatenation directly
  string clientRefText = "Client Ref: ";
  string croskRefText = "Crosk Ref: ";
  string clientNameText = "Client Name: ";
  string sectionNameText = "Section Name: ";

  foreach (DataRow row in dt2.Rows)
  {
    clientRefText += row["client_ref"].ToString() + "
";
    croskRefText += row["crosk_ref"].ToString() + "
";
    clientNameText += row["client_name"].ToString() + "
";
    sectionNameText += row["section_name"].ToString() + "

";
  }

  // Assign the formatted text to separate labels
  CLIENTREF.Text = clientRefText;
  CROSKREF.Text = croskRefText;
  CLIENTNAME.Text = clientNameText;
  SECTIONNAME.Text = sectionNameText;
}
else
{
  CLIENTREF.Text = "No records found!";
}

Since you're assigning the formatted text to individual labels, there's no need for a StringBuilder here. We can directly concatenate strings. Create separate variables to store the formatted text for each label (clientRefText, croskRefText, etc.). This improves code readability. Inside the loop, we append the retrieved values from each row with line breaks () to the corresponding text variables.

fergus2y ago
Thomas thank you for your solution. how can i stop the resulting output coming out in one lump of text? could i assign it to labels in any way?
fergus2y ago
thats super guys thank you!!!

Jayraj Chhaya2y ago

The issue you're encountering is that you're only accessing a single row (dt2.Rows[3]) from the DataTable dt2, which is why you're only seeing one row displayed. It would help if you iterated through each row in the DataTable to display all rows. Here's how you can modify your code to achieve that:

myCon.Open();
string qry2 = "select client_ref, crosk_ref, client_name, section_name from md_overall_temp where client_code='" + lblRefNum.Text + "'";
SqlCommand cmd2 = new SqlCommand(qry2, myCon);
SqlDataAdapter adapter2 = new SqlDataAdapter(cmd2);
DataTable dt2 = new DataTable();
adapter2.Fill(dt2);

if (dt2.Rows.Count > 0)
{
    // Clear any previous text
    CLIENTREF.Text = "";
    CROSKREF.Text = "";
    CLIENTNAME.Text = "";
    SECTIONNAME.Text = "";

    // Iterate through each row in the DataTable
    foreach (DataRow row in dt2.Rows)
    {
        string clientRef = row["client_ref"].ToString();
        CLIENTREF.Text += clientRef + "
"; // Append each value with a line break
        string croskRef = row["crosk_ref"].ToString();
        CROSKREF.Text += croskRef + "
";
        string clientName = row["client_name"].ToString();
        CLIENTNAME.Text += clientName + "
";
        string section_name = row["section_name"].ToString();
        SECTIONNAME.Text += section_name + "
";
    }
}
else
{
    CLIENTREF.Text = "No record found!";
}

myCon.Close();

Jithu Thomas2y ago

It seems like you are fetching data from your SQL table and displaying it on an ASP.NET page. The issue you're facing is that you're only retrieving one row from the table and trying to access the fourth row (dt2.Rows[3]) which may not exist. To display all rows, you need to iterate over the rows in the DataTable. Here's how you can modify your code to display all rows: -

myCon.Open();
string qry2 = "SELECT client_ref, crosk_ref, client_name, section_name FROM md_overall_temp WHERE client_code='" + lblRefNum.Text + "'";
SqlCommand cmd2 = new SqlCommand(qry2, myCon);
SqlDataAdapter adapter2 = new SqlDataAdapter(cmd2);
DataTable dt2 = new DataTable();
adapter2.Fill(dt2);
myCon.Close();

if (dt2.Rows.Count > 0)
{
    StringBuilder stringBuilder = new StringBuilder();
    foreach (DataRow row in dt2.Rows)
    {
        stringBuilder.Append("Client Ref: ").Append(row["client_ref"]).Append("
");
        stringBuilder.Append("Crosk Ref: ").Append(row["crosk_ref"]).Append("
");
        stringBuilder.Append("Client Name: ").Append(row["client_name"]).Append("
");
        stringBuilder.Append("Section Name: ").Append(row["section_name"]).Append("

");
    }
    CLIENTREF.Text = stringBuilder.ToString();
}
else
{
    CLIENTREF.Text = "No records found!";
}