在asp.net中插入记录

Question

当用户在动态创建的行中选择名称并单击按钮保存时，我尝试从gridview插入记录。但有时记录可以保存，大多数时候不是。我的编程逻辑是否有问题？希望有帮助。谢谢。

前端代码

  <td>
    <asp:Button ID="btnSave" runat="server" Text="Save" CssClass="btn btn-primary" Style="margin-top: 5px; margin-left: 150px" OnClick="btnSave_Click" /></td>

后端代码

 protected void btnSave_Click(object sender, EventArgs e)
        {
            grid2.SaveSelectionToViewState();
            string Branch = txtBranch.Text.Trim();
            string Name = txtName.Text.Trim();
            string sql = "";
            string Slmn = "";

            DBHandler dbh = new DBHandler();
            string active;

            if (checkbox_id.Checked)
            {
                active = "1";
            }
            else
            {
                active = "0";
            }

            try
            {
                if (Branch != "" && Name != "")
                {
                    dbh.OpenConnection();
                    for (int i = 0; i < grid2.Rows.Count; i++)
                    {
                        Slmn = ((TextBox)grid2.Rows[i].Cells[1].FindControl("TextBox1")).Text.Trim();

                        sql = "Insert into fcs_cotmdl (crdt,crid,cono,tmdl,slmn,acti) values (sysdate,'SYSTEM','" + Branch + "','";
                        sql += Name + "','" + Slmn + "','" + active + "')";

                        dbh.ExecuteNonQuery(sql);
                        dbh.TransactionCommit();

                        Page.ClientScript.RegisterStartupScript(this.GetType(), "Scripts", "<script>alert('Saved');</script>");

                    }
                }
                else
                {
                    Page.ClientScript.RegisterStartupScript(this.GetType(), "Scripts", "<script>alert('Please fill in the Branch Code or Team Leader Name');</script>");
                }
            }
            catch (Exception exp)
            {
                dbh.TransactionRollBack();
            }
            finally
            {
                dbh.CloseConnection();
            }

            checkbox_id.Checked = false;
            txtBranch.Text = "";
            txtName.Text = "";
            grid2.DataBind();
            SetInitialRow();

        }