如何通过跳过列将值插入ListViewItem？ [英] how to insert values into ListViewItem by skipping column?

问题描述

我有一个包含3列的ListViewItem（货币，买入，卖出）。我想根据我从源表中获得的交换类型显示买入/卖出列中的汇率。

有人可以提供一些有关如何执行此操作的线索吗？下面是我的代码。

目前所有内容都显示在Buy列上。



public void getExchangeRates（）

{

lsvExchangeRate.Clear（）;

lsvExchangeRate.Columns.Add（Currency，100，Horizo​​ntalAlignment.Left）;

lsvExchangeRate.Columns .Add（Buy，100，Horizo​​ntalAlignment.Left）;

lsvExchangeRate.Columns.Add（Sell，100，Horizo​​ntalAlignment.Left）;



尝试

{

List< getexchangeratesvo> geRate = erBAL.getExchangeRatesBAL（）。ToList（）;



foreach（geRate中的getExchangeRatesVO grVO）

{

ListViewItem myItem = new ListViewItem（grVO.currencyName）;

if（grVO.exchangeType ==Buy）

{

myItem .SubItems.Add（grVO.exchangeRate.ToString（））;

lsvExchangeRate.Items.Add（myItem）;

}

else < br $>
{

myItem.SubItems.Add（grVO.exchangeRate.ToString（））;

lsvExchangeRate.Items.Add（myItem）;

}

}

}

Hi,

I have a ListViewItem with 3 columns (Currency, Buy, Sell). I want to show the rate in Buy/Sell Columns base on the exchange type i get from the source table.
Could someone provide some clues on how to do this? Below is my code.
Currently everything displays on Buy column.

public void getExchangeRates()
{
lsvExchangeRate.Clear();
lsvExchangeRate.Columns.Add("Currency", 100, HorizontalAlignment.Left);
lsvExchangeRate.Columns.Add("Buy", 100, HorizontalAlignment.Left);
lsvExchangeRate.Columns.Add("Sell", 100, HorizontalAlignment.Left);

try
{
List<getexchangeratesvo> geRate = erBAL.getExchangeRatesBAL().ToList();

foreach (getExchangeRatesVO grVO in geRate)
{
ListViewItem myItem = new ListViewItem(grVO.currencyName);
if (grVO.exchangeType == "Buy")
{
myItem.SubItems.Add(grVO.exchangeRate.ToString());
lsvExchangeRate.Items.Add(myItem);
}
else
{
myItem.SubItems.Add(grVO.exchangeRate.ToString());
lsvExchangeRate.Items.Add(myItem);
}
}
}

推荐答案

嗨。



我目前使用以下扩展方法

Hi.

I currently use the following extension methods

public static partial class ListViewSubItemExtensions
{
    public static void SetText(this ListViewItem.ListViewSubItemCollection self,
                                int columnIndex, string text)
    {
        while (self.Count <= columnIndex)
            self.Add(string.Empty);

        self[columnIndex].Text = text;
    }
    public static void SetText<T>(this ListViewItem.ListViewSubItemCollection self,
                                int columnIndex, T value)
    {
        SetText(self, columnIndex, value.ToString());
    }
    public static void SetText(this ListViewItem.ListViewSubItemCollection self,
                                ColumnHeader column, string text)
    {
        SetText(self, column.Index, text);
    }
    public static void SetText<T>(this ListViewItem.ListViewSubItemCollection self,
                                ColumnHeader column, T value)
    {
        SetText(self, column.Index, value.ToString());
    }
}

循环体将变为：

the body of your loop would become:

ListViewItem myItem = new ListViewItem(grVO.currencyName);

if (grVO.exchangeType == "Buy")
    myItem.SubItems.SetText(1, grVO.exchangeRate);
else
    myItem.SubItems.SetText(2, grVO.exchangeRate);

lsvExchangeRate.Items.Add(myItem);

问候，

Daniele。

Regards,
Daniele.

谢谢Daniele。我非常感谢你的帮助。您提供的代码完美无缺。我是新手编程，看到你的解决方案后我还有很长的路要走。



问候，

Nate

Thank you Daniele. I really appreciate the help. The code you provided work perfectly. I am new to to programming, after seeing your solutions I have a long way to go.

Regards,
Nate

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