c# combobox控件的使用

POJO:

    class ComboBoxItem
    {
        string _text;
        string _value;

        public string Text
        {
            get { return _text; }
            set { _text = value; }
        }

        public string Value
        {
            get { return _value; }
            set { _value = value; }
        }
        public override String ToString() {
            return this.Value;
        }

    }

Init:

        private void SurferWithProxy_Load(object sender, EventArgs e)
        {
            intiComboBox();
        }

        private void intiComboBox() {
            ComboBoxItem cbi = new ComboBoxItem();
            cbi = new ComboBoxItem();
            cbi.Text = "test1";
            cbi.Value = "Value1";
            this.cboURL.Items.Add(cbi);

            cbi = new ComboBoxItem();
            cbi.Text = "test2";
            cbi.Value = "Value2";
            this.cboURL.Items.Add(cbi);

            cbi = new ComboBoxItem();
            cbi.Text = "test3";
            cbi.Value = "Value3";
            this.cboURL.Items.Add(cbi);

            cbi = new ComboBoxItem();
            cbi.Text = "test4";
            cbi.Value = "Value4";
            this.cboURL.Items.Add(cbi);

            this.cboURL.DisplayMember = "Text";
            this.cboURL.ValueMember = "Value";
      }
          

Click:
       private void btnStart_Click(object sender, EventArgs e)
        {
            string url = ((ComboBoxItem)this.cboURL.SelectedItem).Value;
            MessageBox.Show(url);
        }

.csharpcode, .csharpcode pre
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background-color: #ffffff;
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.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
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width: 100%;
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.csharpcode .lnum { color: #606060; }

补充：

ComboBox控件添加项有两种方法：

一、编程方式添加：

使用comboBox.Items.Add(ojbect item)方法添加一个项

        private void DoBindData()
        {
            for (int i = 0; i < 5; i++)
            {
                comboBox1.Items.Add(i + 1);
            }
        }

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

二、进行数据源绑定：

        private void DoBindDataSource()
        {
            //构造数据源（或从数据库中查询）
            DataTable ADt = new DataTable();
            DataColumn ADC1 = new DataColumn("F_ID", typeof(int));
            DataColumn ADC2 = new DataColumn("F_Name", typeof(string));
            ADt.Columns.Add(ADC1);
            ADt.Columns.Add(ADC2);
            for (int i = 0; i < 3; i++)
            {
                DataRow ADR = ADt.NewRow();
                ADR[0] = i+1;
                ADR[1] = "Name_" + (i+1);
                ADt.Rows.Add(ADR);
            }
            //进行绑定
            comboBox1.DisplayMember = "F_Name";//控件显示的列名
            comboBox1.ValueMember = "F_ID";//控件值的列名
            comboBox1.DataSource = ADt;
        }

三、其他操作和常用属性：

1）Text属性：获取当前显示的文本

2）SelectedText属性：获得当前选中的文本（控件获得光标且DropDown属性不为DropDownList）

注意：但应注意，所选内容会因用户交互而自动更改。如Button的Click事件中，SelectedIndexChanged 或 SelectedValueChanged 事件中，此属性会返回空字符串（参见MSCN：http://msdn.microsoft.com/zh-cn/partners/system.windows.forms.combobox.selectedtext(VS.90).aspx )

3）SelectedValue属性：当前显示项对应的Value值（仅在绑定数据源时，设置了ValueMember时才可以用）

4）SelectedItem属性：控件当前选中项

5）SelectedIndex属性：当前选中项的索引

http://rsljdkt.iteye.com/blog/826941

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }