Question

我的表格标识的数据网格视图，最后一列有状态。

因此，我假设我在datagridview上选择了10行中的5行。

我要做的是，当我点击一个按钮时，只会影响所选行，并且状态会发生变化。

我已经尝试过这段代码和其他代码，但它们似乎都没有用。我是c＃的新手，所以有没有人可以帮助我？

private void button_Click(object sender, EventArgs e)
    {
        int count = dataGridView1.SelectedRows.Count;
        for (int i = count-1; i >=0; i--)
        {

            if (i == dataGridView1.SelectedRows.Count)
            {
                Identification it = new Identification();
                it.Status = "ACTIVE";
                Repository.Identification_UpdateStatus(it);
            }
        }
    }

Answer 1

您可能想要循环播放 dataGridView1.SelectedRows获取每个DataGridViewRow对象代码：

foreach(DataGridViewRow row in dataGridView1.SelectedRows)
{
   // implement your logic here
   // update selected rows by making changes to 'row'  object
}

Answer 2

执行此操作的正确方法是使用DataBinding。由于您使用的是诸如“识别”之类的域对象，因此这将是一个合适的选择。

 public partial class Form1 : Form
{
    //Your form
    public Form1()
    {
        InitializeComponent();
        //Wrap your objects in a binding list before setting it as the 
        //datasource of your datagrid
        BindingList<Identification> ids = new BindingList<Identification>
        {
            new Identification() { status="NEW"  },
             new Identification() { status="NEW"  },
              new Identification() {status="NEW"  },
        };
        dataGridView1.DataSource = ids;
    }

    private void btnChangeStatus_Click(object sender, EventArgs e)
    {   //Where the actual status changing takes place
        foreach (DataGridViewRow row in dataGridView1.SelectedRows)
        {
            var identifaction = row.DataBoundItem as Identification;
            identifaction.status = "VERIFIED";
        }

    }
    //Model: Class that carries your data
    class Identification: INotifyPropertyChanged
    {

        private string _status;
        public string status
        {
            get { return _status; }
            set
            {
                _status = value;
                NotifyPropertyChanged("status");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        private void NotifyPropertyChanged(string name)
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs(name));
        }

    }    

}

只有Datagrid上的SelectedRows才会受到影响

2 个答案: