多组合框使用相同的数据源（C＃） [英] Multiple Combo Boxes With The Same Data Source (C#)
问题描述
更新：这是现在已经得到解决，请回答以下
在我的形式之一（在Windows窗体应用程序）我有3个组合框。这些组合框需要显示价格的列表（在文本中，用一个整数后端值）。
所有这些组合框所使用的相同的数据源（的List<类型TSPrice的>，与ValueMember设置价格和的DisplayMember设置说明）
我的问题是这样的......每次我选择一个价格选项。在下拉菜单中，他们都更改为相同的价值... ...这是什么做的他们都被绑定到同一数据源？
下面是怎么了结合他们：
VAR价格表=新的List< TSPrice>
{
新TSPrice（0，），
新TSPrice（0，半天），
新TSPrice（0，全天），
新TSPrice（0，1 +半），
新TSPrice（0，2天），
新TSPrice（0，正式的报价要求）
};
objInsuredPrice.DataSource =价目表;
objTPPrice.DataSource =价目表;
objProvSum.DataSource =价目表;
objInsuredPrice.ValueMember =价格;
objTPPrice.ValueMember =价格;
objProvSum.ValueMember =价格;
objInsuredPrice.DisplayMember =说明;
objTPPrice.DisplayMember =说明;
objProvSum.DisplayMember =说明;
objInsuredPrice.SelectedIndex = 0;
objTPPrice.SelectedIndex = 0;
objProvSum.SelectedIndex = 0;
//objInsuredPrice.DataSource = objTPPrice.DataSource = objProvSum.DataSource =价目表;
//objInsuredPrice.ValueMember = objTPPrice.ValueMember = objProvSum.ValueMember =价格;
//objInsuredPrice.DisplayMember = objTPPrice.DisplayMember = objProvSum.DisplayMember =说明;
//objInsuredPrice.SelectedIndex = objTPPrice.SelectedIndex = objProvSum.SelectedIndex = 0;
编辑：问题是，他们都被绑定到同一DataSource的由SAURABH证实。这是我如何解决它。
VAR价格表=新的List< TSPrice>
{
新TSPrice（0，），
新TSPrice（1，半天），
新TSPrice（2，全日），
新TSPrice（3，1 +半），
新TSPrice（4，2天），
新TSPrice（5，正式的报价要求）
};
变种insuredList =新TSPrice [5];
变种TPList =新TSPrice [5];
变种provList =新TSPrice [5];
priceList.CopyTo（insuredList）;
priceList.CopyTo（TPList）;
priceList.CopyTo（provList）;
objInsuredPrice.DataSource = insuredList;
objTPPrice.DataSource = TPList;
objProvSum.DataSource = provList;
objInsuredPrice.ValueMember = objTPPrice.ValueMember = objProvSum.ValueMember =价格;
objInsuredPrice.DisplayMember = objTPPrice.DisplayMember = objProvSum.DisplayMember =说明;
objInsuredPrice.SelectedIndex = objTPPrice.SelectedIndex = objProvSum.SelectedIndex = 0;
我知道你没有要求，但可能我建议你重构你的最终代码一点： - ）
私人列表< TSPrice> GetPriceList（）
{
返回新的List< TSPrice>
{
新TSPrice（0，），
新TSPrice（0，半天），
新TSPrice（0，全天），
新TSPrice（0，1 +半），
新TSPrice（0，2天），
新TSPrice（0，正式的报价要求）
};
}
私人无效BindPriceList（组合框组合框，列表< TSPrice>价目表）
{
comboBox.DataSource =价目表（）;
comboBox.ValueMember =价格;
comboBox.DisplayMember =说明;
comboBox.SelectedIndex = 0;
}
BindPriceList（objInsuredPrice，GetPriceList（））;
BindPriceList（objTPPrice，GetPriceList（））;
BindPriceList（objProvSum，GetPriceList（））;
UPDATE: This is now resolved, see answer below.
On one of my forms (in a Windows Forms application) I have 3 Combo Boxes. These combo boxes need to display a list of prices (In text, with an integer back-end value).
All of these combo boxes are using the same data source (A List<> of type TSPrice, with ValueMember set to Price and DisplayMember set to Description).
My problem is this... Everytime I choose a price option from one of the dropdowns, they ALL change to the same value... Is this something to do with them all being bound to the same data source?
Here is how I am binding them:
var priceList = new List<TSPrice>
{
new TSPrice(0, ""),
new TSPrice(0, "Half Day"),
new TSPrice(0, "Full Day"),
new TSPrice(0, "1 + Half"),
new TSPrice(0, "2 Days"),
new TSPrice(0, "Formal Quote Required")
};
objInsuredPrice.DataSource = priceList;
objTPPrice.DataSource = priceList;
objProvSum.DataSource = priceList;
objInsuredPrice.ValueMember = "Price";
objTPPrice.ValueMember = "Price";
objProvSum.ValueMember = "Price";
objInsuredPrice.DisplayMember = "Description";
objTPPrice.DisplayMember = "Description";
objProvSum.DisplayMember = "Description";
objInsuredPrice.SelectedIndex = 0;
objTPPrice.SelectedIndex = 0;
objProvSum.SelectedIndex = 0;
//objInsuredPrice.DataSource = objTPPrice.DataSource = objProvSum.DataSource = priceList;
//objInsuredPrice.ValueMember = objTPPrice.ValueMember = objProvSum.ValueMember = "Price";
//objInsuredPrice.DisplayMember = objTPPrice.DisplayMember = objProvSum.DisplayMember = "Description";
//objInsuredPrice.SelectedIndex = objTPPrice.SelectedIndex = objProvSum.SelectedIndex = 0;
Edit: The issue was that they were all being bound to the same DataSource as confirmed by Saurabh. This is how I solved it.
var priceList = new List<TSPrice>
{
new TSPrice(0, ""),
new TSPrice(1, "Half Day"),
new TSPrice(2, "Full Day"),
new TSPrice(3, "1 + Half"),
new TSPrice(4, "2 Days"),
new TSPrice(5, "Formal Quote Required")
};
var insuredList = new TSPrice[5];
var TPList = new TSPrice[5];
var provList = new TSPrice[5];
priceList.CopyTo(insuredList);
priceList.CopyTo(TPList);
priceList.CopyTo(provList);
objInsuredPrice.DataSource = insuredList;
objTPPrice.DataSource = TPList;
objProvSum.DataSource = provList;
objInsuredPrice.ValueMember = objTPPrice.ValueMember = objProvSum.ValueMember = "Price";
objInsuredPrice.DisplayMember = objTPPrice.DisplayMember = objProvSum.DisplayMember = "Description";
objInsuredPrice.SelectedIndex = objTPPrice.SelectedIndex = objProvSum.SelectedIndex = 0;
I know you didn't ask for it but may I suggest you to refactor your final code a little bit :-)
private List<TSPrice> GetPriceList()
{
return new List<TSPrice>
{
new TSPrice(0, ""),
new TSPrice(0, "Half Day"),
new TSPrice(0, "Full Day"),
new TSPrice(0, "1 + Half"),
new TSPrice(0, "2 Days"),
new TSPrice(0, "Formal Quote Required")
};
}
private void BindPriceList(ComboBox comboBox, List<TSPrice> priceList)
{
comboBox.DataSource = priceList();
comboBox.ValueMember = "Price";
comboBox.DisplayMember = "Description";
comboBox.SelectedIndex = 0;
}
BindPriceList(objInsuredPrice, GetPriceList());
BindPriceList(objTPPrice, GetPriceList());
BindPriceList(objProvSum, GetPriceList());
这篇关于多组合框使用相同的数据源（C＃）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
