fill text box from data table

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C#

DataTable dt3 = new DataTable();
            string CS = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString;
            using (SqlConnection con = new SqlConnection(CS))
            {
                string sqlstr2 = "select max(catId) from tblcatProducts";
                using (SqlDataAdapter dr2 = new SqlDataAdapter(sqlstr2, CS))
                {

                    dr2.Fill(dt3);
                    txtCatIdProducts.Text = dt3.ToString();

Posted 20-Mar-15 11:38am

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manchanx · Accepted Answer · 2015-03-20T11:50:00

This:

C#

dt3.ToString();

will just give you the String-representation of the whole DataTable, something like "System.Data.DataTable". Not any of the values therein.

Since you're querying for a single value, it will be in row 0, column 0:

C#

txtCatIdProducts.Text = dt3.Rows[0][0].ToString();

Whenever querying for single values you should use ExecuteScalar[^] which is meant for exactly that, instead of an SqlDataAdapter.