从ASPxComboBox获取价值获取价值

Question

I have combobox with 2 values, ID and Name. I need to get ID from selected item, and I don't know how.

ASPxComboBox1.SelectedItem.GetValue(ID);

Not working.

Answer 1

ASPxComboBox1.TextField = "Name"; //This is the displayMember   
ASPxComboBox1.ValueField = "ID";  //This is the valueMember
ASPxComboBox1.ValueType = typeof(String);
ASPxComboBox1.DataSource = DataTableWithIDandNameColumns;
ASPxComboBox1.DataBind();

String theID = Convert.ToString(ASPxComboBox1.Value);//The column in the datasource that is specified by the ValueField property.
   OR:
String theID = Convert.ToString(ASPxComboBox1.SelectedItem.GetValue("ID"));//Any column name in the datasource.
   Also:
String theName = Convert.ToString(ASPxComboBox1.SelectedItem.GetValue("Name"));

Answer 2

使用ASPxComboBox.Value属性。

Answer 3

A combobox can only have one value per item and this is retrieved in your case by:

ASPxComboBox1.Value

See here in the documentation .

Since the value returned will be of type object , you will need to cast this to the type originally set, eg String . Then you will be able to work with it.

Answer 4

Usually the problem, when the ASPxComboBox's SelectedItem / SelectedIndex is incorrect, occurs when the ASPxComboBox's ValueType http://documentation.devexpress.com/#AspNet/DevExpressWebASPxEditorsASPxComboBox_ValueTypetopic property is specified incorrectly.

Ensure that the ValueType is set, corresponding to the "Data Type Mappings (ADO.NET)" http://msdn.microsoft.com/en-us/library/cc716729.aspx table.