如何在JFace ComboViewer中设置键和值？ [英] How do I Set a Key and a Value in a JFace ComboViewer?
问题描述
我试图设置一个显示用户名的组合框，但是当选择该组合框时，它将发送一个ID。
I am trying to set up a combo box that will display a UserName, but when selected will send a an ID instead.
我已经设置了一个方法会查询我的Derby数据库并返回包含用户名和ID的多维数组。
I have already set up a method that queries my Derby database and returns a multidimensional array with the UserNames and IDs.
我对如何进行设置进行了一些研究，发现了几条建议JFace的帖子，但没有任何提示关于如何完成此操作。
I did some research on how to set this up and found several posts suggesting JFace, but nothing on how to accomplish this.
我尝试了setData（String Key，Object Value）和add（String String，int index）。
我也看过DataBinding，但是没有找到我可以做的任何事情。
I have tried setData(String Key, Object Value), and add(String String, int index). I have also looked at DataBinding, but haven't found anything that I am able to make work.
谢谢，
更新----------------------
我的工作到了一定程度。
我想我已经正确设置了内容提供程序，但是当我运行该应用程序时，它将打印所有标签，与列表中的最后一项相同。
Update---------------------- I got it working to a point. I think I have the content provider set up properly however when I go to run the app it prints all the labels the same as the last item in the list.
Model Provider：
Model Provider:
public enum ModelProvider {
INSTANCE;
public List<Animal> Animals;
public String conn = "L:\\Dropbox\\Herd_Management\\database";
private ModelProvider() {
Animals = new ArrayList<Animal>();
String strSQL = null;
strSQL = "SELECT Herd_ID FROM dbherd_management.TBLHERD";
String[] straHerd_IDs = CC_Derby.getResultArray(conn, "", "", strSQL);
for (int r = 0; r < straHerd_IDs.length; r++) {
Animals.add(new Animal(Integer.parseInt(straHerd_IDs[r])));
}
}
public List<Animal> getAnimals() {
return Animals;
}
}
内容和标签提供商的代码段：
Snippet For Content and Label Providers:
comboViewer_9 = new ComboViewer(shlHerdManagement, SWT.NONE);
final Combo cboAnimalTag = comboViewer_9.getCombo();
cboAnimalTag.setLayoutData(new GridData(SWT.FILL, SWT.FILL,
true, false, 1, 1));
cboAnimalTag.setText("<Select Animal Tag>");
comboViewer_9.setContentProvider(new ArrayContentProvider());
comboViewer_9.setInput(ModelProvider.INSTANCE.getAnimals());
comboViewer_9.setLabelProvider(new LabelProvider() {
@Override
public String getText(Object element) {
Animal a = (Animal) element;
return (a.getTag());
}
});
动物构造体
public Animal(int intAnimal_ID) {
Connection conn = CC_Derby.createConnection("L:\\Dropbox\\Herd_Management\\database","","");
String strSQL = "SELECT * FROM dbherd_management.TBLHERD WHERE HERD_ID ="
+ intAnimal_ID;
try {
stmt = conn.createStatement();
ResultSet results = null;
results = stmt.executeQuery(strSQL);
while (results.next()) {
intHerd_id = results.getInt(1);
strHerd_Tag_Letter = results.getString(2);
intHerd_Tag_Num = results.getInt(3);
strHerd_Tag_Color = results.getString(4);
strHerd_Sex = results.getString(5);
strHerd_Type = results.getString(6);
dtHerd_Birthdate = results.getString(7);
intHerd_Sire = results.getInt(8);
intHerd_Dam = results.getInt(9);
intHerd_Owner = results.getInt(10);
strHerd_TimeStamp = results.getString(11);
strHerd_Status = results.getString(12);
dtHerd_Status_Date = results.getString(13);
}
results.close();
stmt.close();
CC_Derby.shutdown(stmt, conn);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
getTag方法
public String getTag(){
String strResult = null;
String l = null;
int n = 0;
String c = null;
l = getHerd_Tag_Letter();
n = getHerd_Tag_Num();
c = getHerd_Tag_Color();
if(l == null){
l ="";
}
if(c == null){
c = "";
}
strResult = l + n + " " + c;
return strResult;
}
推荐答案
内容提供商和标签提供商。内容提供者提供对象（UserNameIdPair），标签提供者提供标签（UserName字符串）。视图的选择监听器将是由内容提供商提供的发送对象。
You have a viewer with a content provider and a label provider. Content provider serves the objects (UserNameIdPair), label provider provides labels (UserName string). View's selection listeners will be "sent" objects provided by content provider.
这篇关于如何在JFace ComboViewer中设置键和值？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！
