我有一個文本框的金額,我想要下面的語句來顯示它。如何在文本框中顯示總金額?
下面是我的代碼:
<!--Amount-->
<div class="form-group">
<label class="control-label col-lg-4">
Amount</label>
<div class="col-lg-8">
<asp:TextBox ID="txtBudget" runat="server" class="form-control" AutoPostBack="True" />
</div>
</div>
代碼背後:
void GetTotalAmount()
{
con.Open();
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = "SELECT SUM(Materials.SellingPrice + Equipments.Price + Resource_Vehicles.Cost + Contractors.Rate) " +
"FROM ProjectTasks INNER JOIN Resource_Contractors ON ProjectTasks.TaskID = Resource_Contractors.TaskID INNER JOIN " +
"Resource_Equipments ON ProjectTasks.TaskID = Resource_Equipments.TaskID INNER JOIN Resource_Materials ON ProjectTasks.TaskID = Resource_Materials.TaskID INNER JOIN " +
"Resource_Vehicles ON ProjectTasks.TaskID = Resource_Vehicles.TaskID INNER JOIN Contractors ON Resource_Contractors.ContractorID = Contractors.ContractorID INNER JOIN " +
"Materials ON Resource_Materials.MaterialID = Materials.MaterialID INNER JOIN Equipments ON Resource_Equipments.EquipmentID = Equipments.EquipmentID INNER JOIN " +
"Vehicles ON Resource_Vehicles.VehicleID = Vehicles.VehicleID WHERE [email protected]";
SqlDataReader dr = cmd.ExecuteReader();
con.Close();
}
謝謝!
你可以add-txtBudget.Text = Convert.ToString(dr); SqlDataReader之後的行dr = cmd.ExecuteReader(); – ShaileshDev
我刪除了我的答案,贊成以下兩條,但值得補充的是,您並未指定參數值。在執行命令之前,你需要像'cmd.Parameters.AddWithValue(「@ TaskID」,taskid);'Where'任務'=你想要的'id'。有些人會認爲你不應該使用'AddWithValue',但是對於某些數據類型,它確實不是問題。 – Fred