Question

我想在按钮点击时从标签中减去数字。当我按下按钮时，点击值只减去一次，然后在第二次点击同一按钮时没有任何事情发生。我无法弄清楚问题是什么？ - 这里是我的代码：

  protected void btnTest_Click(object sender, EventArgs e)
    {


        Session["Counter"] = newValue;

        if (ViewState["Markici"] != null)
        {
            dtCurrentTable = (DataTable)ViewState["Markici"];
            ViewState["Markici"] = dtCurrentTable;
            dtCurrentTable = (DataTable)ViewState["Markici"];

            GridView2.DataSource = dtCurrentTable;
            GridView2.DataBind();
            var clickedRow = ((Button)sender).NamingContainer as GridViewRow;
            var clickedIndex = clickedRow.RowIndex;

            decimal old = dtCurrentTable.Rows[clickedIndex].Field<decimal>("Kolicina");

            decimal oldIznos = dtCurrentTable.Rows[clickedIndex].Field<decimal>("VkIznos");
            decimal VkDanok = dtCurrentTable.Rows[clickedIndex].Field<decimal>("VkDanok");
            string Cena1 = dtCurrentTable.Rows[clickedIndex].Field<string>("Cena1");
            int TarifaID = dtCurrentTable.Rows[clickedIndex].Field<Int32>("TarifaID");



            decimal newIznos = oldIznos - Convert.ToDecimal(Cena1);

            dtCurrentTable.Rows[clickedIndex].SetField("Kolicina", newValue.ToString());
            dtCurrentTable.Rows[clickedIndex].SetField("VkIznos", newIznos.ToString());

 //Here i do the operation 
            decimal minus = Convert.ToDecimal(Label42.Text) - Convert.ToDecimal(Cena1);
            Label26.Text = minus.ToString();
           }

Answer 1

我一直在用错误的标签减去..

decimal minus = Convert.ToDecimal(Label42.Text) - Convert.ToDecimal(Cena1);
Label42.Text = minus.ToString();

在asp.net中减去标签值

1 个答案: