在c# WinApp中,我如何同时添加文本和值到我的组合框的项目? 我做了一个搜索,通常答案是使用“绑定到一个源”..但在我的情况下,我没有一个绑定源准备在我的程序… 我怎么做这样的事情:
combo1.Item[1] = "DisplayText";
combo1.Item[1].Value = "useful Value"
在c# WinApp中,我如何同时添加文本和值到我的组合框的项目? 我做了一个搜索,通常答案是使用“绑定到一个源”..但在我的情况下,我没有一个绑定源准备在我的程序… 我怎么做这样的事情:
combo1.Item[1] = "DisplayText";
combo1.Item[1].Value = "useful Value"
当前回答
你可以像这样使用匿名类:
comboBox.DisplayMember = "Text";
comboBox.ValueMember = "Value";
comboBox.Items.Add(new { Text = "report A", Value = "reportA" });
comboBox.Items.Add(new { Text = "report B", Value = "reportB" });
comboBox.Items.Add(new { Text = "report C", Value = "reportC" });
comboBox.Items.Add(new { Text = "report D", Value = "reportD" });
comboBox.Items.Add(new { Text = "report E", Value = "reportE" });
更新:虽然上面的代码将正确显示在组合框中,你将不能使用组合框的SelectedValue或SelectedText属性。为了能够使用这些,绑定组合框如下:
comboBox.DisplayMember = "Text";
comboBox.ValueMember = "Value";
var items = new[] {
new { Text = "report A", Value = "reportA" },
new { Text = "report B", Value = "reportB" },
new { Text = "report C", Value = "reportC" },
new { Text = "report D", Value = "reportD" },
new { Text = "report E", Value = "reportE" }
};
comboBox.DataSource = items;
其他回答
类创造:
namespace WindowsFormsApplication1
{
class select
{
public string Text { get; set; }
public string Value { get; set; }
}
}
Form1代码:
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
List<select> sl = new List<select>();
sl.Add(new select() { Text = "", Value = "" });
sl.Add(new select() { Text = "AAA", Value = "aa" });
sl.Add(new select() { Text = "BBB", Value = "bb" });
comboBox1.DataSource = sl;
comboBox1.DisplayMember = "Text";
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
select sl1 = comboBox1.SelectedItem as select;
t1.Text = Convert.ToString(sl1.Value);
}
}
}
// Bind combobox to dictionary
Dictionary<string, string>test = new Dictionary<string, string>();
test.Add("1", "dfdfdf");
test.Add("2", "dfdfdf");
test.Add("3", "dfdfdf");
comboBox1.DataSource = new BindingSource(test, null);
comboBox1.DisplayMember = "Value";
comboBox1.ValueMember = "Key";
// Get combobox selection (in handler)
string value = ((KeyValuePair<string, string>)comboBox1.SelectedItem).Value;
我有同样的问题,我所做的是添加一个新的ComboBox,只有在相同的索引值,然后第一个,然后当我改变主要组合的索引在第二个改变的同时,然后我取第二个组合的值,并使用它。
这是代码:
public Form1()
{
eventos = cliente.GetEventsTypes(usuario);
foreach (EventNo no in eventos)
{
cboEventos.Items.Add(no.eventno.ToString() + "--" +no.description.ToString());
cboEventos2.Items.Add(no.eventno.ToString());
}
}
private void lista_SelectedIndexChanged(object sender, EventArgs e)
{
lista2.Items.Add(lista.SelectedItem.ToString());
}
private void cboEventos_SelectedIndexChanged(object sender, EventArgs e)
{
cboEventos2.SelectedIndex = cboEventos.SelectedIndex;
}
您应该在运行时使用动态对象来解析组合框项。
comboBox.DisplayMember = "Text";
comboBox.ValueMember = "Value";
comboBox.Items.Add(new { Text = "Text", Value = "Value" });
(comboBox.SelectedItem as dynamic).Value
您可以使用此代码将一些项插入到具有文本和值的组合框中。
C#
private void ComboBox_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
{
combox.Items.Insert(0, "Copenhagen");
combox.Items.Insert(1, "Tokyo");
combox.Items.Insert(2, "Japan");
combox.Items.Insert(0, "India");
}
XAML
<ComboBox x:Name="combox" SelectionChanged="ComboBox_SelectionChanged_1"/>