How to sum items in listview to others on SQL server

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I try to sum each item in listview to table but I always get empty cells

What I have tried:

C#

string sql = "UPDATE itmscat1 SET [itmcount] = [itmcount] + @itmcount WHERE [itmcode] = @itmcode";
                cm.CommandText = sql;
                foreach (ListViewItem item in listView1.Items)
                {
                    cm.Parameters.Clear();
                    cm.Parameters.Clear();
                    SqlParameter par_ItmCount = new SqlParameter("@itmcount", SqlDbType.Int);
                    par_ItmCount.Value = item.SubItems[4].Text;
                    cm.Parameters.Add(par_ItmCount);

                    SqlParameter par_ItmCode = new SqlParameter("@itmcode", SqlDbType.Int);
                    par_ItmCode.Value = item.SubItems[1].Text;
                    cm.Parameters.Add(par_ItmCode);
                    {
                        cm.ExecuteNonQuery();
                    }

                }

Posted 15-Aug-16 8:32am

medo0-

Updated 15-Aug-16 9:39am

v2

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Comments

ZurdoDev 15-Aug-16 15:21pm

And the question is?

medo0- 15-Aug-16 15:33pm

it's not working I always get empty cells instead of the sum of the values

Karthik_Mahalingam 16-Aug-16 2:35am

better update all at once

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RossMW · Accepted Answer · 2016-08-15T09:39:00

Solution 1

Your parameters are set as int yet you are passing string values. Make sure the object type are the same (int).

convert the list items to int.

ie

C#

par_ItmCode.Value = Convert.ToInt16(Item.SubItems[4].Text);

Posted 15-Aug-16 9:39am

RossMW