Question

此代码在ASP.NET中使用C＃。该代码的一小段代码如下：

case 1:
{
    txtQty1.Text = decQty.ToString("0.0"); 
    txtDesc1.Text = strDescription; 
    txtCost1.Text = decCost.ToString("0.00"); 
    txtVAT1.Text = decTax.ToString("0.00"); 
    txtTotal1.Text = decTotal.ToString("0.00"); 
    txtGrossEach1.Text = decGrossEach .ToString( "0.00");
    lblCostCodeProfileId1.Text = iCostCodeProfileId.ToString(CultureInfo.InvariantCulture);
    SetupCostCentre1(iCostCodeProfileId);
    // cost centres should be refreshed using the value of Cost Code Profile
    ddlCostCentres1.SelectedValue = iCostCentre.ToString(CultureInfo.InvariantCulture);
    if(iCostCentre !=0)
    {
        RefreshExpenseCodeList1(iCostCentre);
    }
    ddlCostCentres1.SelectedValue = iCostCentre.ToString(CultureInfo.InvariantCulture);

    ddlExpCode1.SelectedValue = iExpenseCode.ToString(CultureInfo.InvariantCulture);
    ddlVatRate1.SelectedValue = iVatRate.ToString(CultureInfo.InvariantCulture);
    break;
}
case 2: 
{
    txtQty2.Text = decQty.ToString("0.0"); 
    txtDesc2.Text = strDescription; 
    txtCost2.Text = decCost.ToString("0.00"); 
    txtVAT2.Text = decTax.ToString("0.00"); 
    txtTotal2.Text = decTotal.ToString("0.00"); 
    txtGrossEach2.Text = decGrossEach.ToString("0.00");
    lblCostCodeProfileId2.Text = iCostCodeProfileId.ToString(CultureInfo.InvariantCulture);
    SetupCostCentre2(iCostCodeProfileId);
    // cost centres should be refreshed using the value of Cost Code Profile
    ddlCostCentres2.SelectedValue = iCostCentre.ToString(CultureInfo.InvariantCulture);
    if (iCostCentre != 0)
    {
        RefreshExpenseCodeList2(iCostCentre);
    }
    ddlCostCentres2.SelectedValue = iCostCentre.ToString(CultureInfo.InvariantCulture);

    ddlExpCode2.SelectedValue = iExpenseCode.ToString(CultureInfo.InvariantCulture);
    ddlVatRate2.SelectedValue = iVatRate.ToString(CultureInfo.InvariantCulture);
    break; 
}

现在，上面列表中案例1和案例2之间的唯一区别在于要填充的字段的名称。这里有很多遗漏或错误的范围，其中要求对每一组进行完全相同的处理。

有什么方法可以动态引用字段并只编写一次代码。

Answer 1

文本框是其他任何对象，因此您可以为它们分配变量。

var txtQty = (param == 1) ? txtQty1 : txtQty2;

txtQty.Text = decQty.ToString("0.0");

但是，您似乎应该拥有一个用户控件来保存所有TextBox，并将其放在页面上两次。将此switch中的代码也放到用户控件中。

用户控制中的方法：

public void FillControls(DataParams p) {

  txtQty.Text = p.decQty.ToString("0.0"); 
  txtDesc.Text = p.strDescription; 
  txtCost.Text = p.decCost.ToString("0.00"); 
  txtVAT.Text = p.decTax.ToString("0.00"); 
  txtTotal.Text = p.decTotal.ToString("0.00"); 
      ...
}

在您的页面或父级控件中

 var uc = (param == 1) ? userControl1 : userControl2;

 uc.FillControls(data);

Answer 2

当然，只需将公共代码拉入一个将控件作为参数的方法。

private void SomeMethod( TextBox qty, TextBox desc, TextBox cost, TextBox, vat, etc... )
{
    qty.Text = decQty.ToString("0.0"); 
    desc.Text = strDescription; 
    cost.Text = decCost.ToString("0.00"); 
    vat.Text = decTax.ToString("0.00"); 
    total1.Text = decTotal.ToString("0.00"); 
    grossEach.Text = decGrossEach .ToString( "0.00");
    /// etc...
}

然后在你的主叫代码中：

case 1:
    SomeMethod( txtQty1, txtDesc1, txtCost1, etc... );
    break;

case 2:
    SomeMethod( txtQty2, txtDesc2, txtCost2, etc... );
    break;

动态字段名称

2 个答案: