开发者

Data Binding and controls

开发者 https://www.devze.com 2022-12-16 10:04 出处:网络
We have the following operation to be performed on the control in our WinForms application. public class BindableDataItem

We have the following operation to be performed on the control in our WinForms application.

public class BindableDataItem
{
   public bool Visible {get; set; }
   public bool Enabled {get;set;}

}

Now we want to bind the BindableDataItemto a TextBox.

Here are binding association.

TextBox.Enabled <==> BindableDataItem.Enabled

TextBox.Visible <==> BindableDataItem.Visible

Now one BindableDataItem objec开发者_运维问答t may associated with many controls with different type.

By calling (BindableDataItem) obj.Enabled = false should disable all the controls attached to the BindableDataItem object.

Any help shall be appreciated.


This is how it is done

class MyDataSouce : INotifyPropertyChanged 
{
    public event PropertyChangedEventHandler PropertyChanged = delegate { };

    private bool enabled=true, visible=true;

    public bool Enabled {
        get { return enabled; }
        set {
            enabled= value;
            PropertyChanged(this, new PropertyChangedEventArgs("Enabled"));
        }

    }

    public bool Visible {
        get { return visible; }
        set {
            visible = value;
            PropertyChanged(this, new PropertyChangedEventArgs("Visible"));
        }
    }
}

Now bind the controls in your form to the your datasource.

MyDataSouce dataSource = new MyDataSouce();
foreach (Control ctl in this.Controls) {

    ctl.DataBindings.Add(new Binding("Enabled", dataSource, "Enabled"));
    ctl.DataBindings.Add(new Binding("Visible", dataSource, "Visible"));

}

Now you can enable/disable controls e.g

dataSource.Enabled = false;


in order for binding to work, this BindableDataItem must implement INotifyPropertyChange Interface. have you done this?

0

精彩评论

暂无评论...
验证码 换一张
取 消

关注公众号