Question

我有要求我在DataGridView中显示Master-Detail信息。

我已将foriegn密钥关系添加到数据集。但是，细节网格不会根据主人的选择来自我掠过。我不知道我在这里缺少什么！

只是为了验证关系是否存在，我已经使用DataGrid检查了它们。我出现在那里。

enter image description here

 namespace WindowsFormsApplication1
 {
  public partial class Form1 : Form
  {
      public Form1()
      {
        InitializeComponent();
      }


    DataSet CreateTableAndFill()
    {
        DataSet ds = new DataSet();
        DataTable Header = ds.Tables.Add("Header");
        DataTable Line = ds.Tables.Add("Line");
        DataColumn dataColumn =  Header.Columns.Add("ID", typeof(int));
        dataColumn.AutoIncrement = true;
        dataColumn.AutoIncrementSeed = 1;
        Header.Columns.Add("Name", typeof(string));
        Line.Columns.Add("ID", typeof(int));
        Line.Columns.Add("Phone", typeof(string));
        DataRelation dataRelation = new DataRelation("ID_FK", Header.Columns["ID"], Line.Columns["ID"]);
        ds.Relations.Add(dataRelation);
        Header.Rows.Add(null, "Huzaiafa");
        Header.Rows.Add(null, "Arthur");
        Line.Rows.Add(1, "4253068516");
        Line.Rows.Add(1, "4252746864");
        Line.Rows.Add(2, "5654034");
        Line.Rows.Add(2, "12563");
        return ds;
    }

    private void button1_Click(object sender, EventArgs e)
    {
       DataSet ds = CreateTableAndFill();
       dataGridView1.DataSource = ds;
       dataGridView2.DataSource = ds;
       dataGridView1.DataMember = "Header";
       dataGridView2.DataMember = "Line";

    }
}
}

即使从msdn应用了漫游，它也无效！结果相同。

    private void button1_Click(object sender, EventArgs e)
    {
       DataSet ds = CreateTableAndFill();

       BindingSource masterBindingSource = new BindingSource();
       BindingSource detailsBindingSource = new BindingSource();

       masterBindingSource.DataSource = ds;
       detailsBindingSource.DataSource = masterBindingSource.DataSource;
       masterBindingSource.DataMember = "Header";
       detailsBindingSource.DataMember = "Line";  

       dataGridView1.DataSource = masterBindingSource;
       dataGridView2.DataSource = detailsBindingSource;


    }

Answer 1

进行以下更改：

Header.Rows.Add(1, "Huzaiafa");        
Header.Rows.Add(2, "Arthur");

detailsBindingSource.DataSource = masterBindingSource;
detailsBindingSource.DataMember = "ID_FK";

Answer 2

您将收到很多MSDN文章Walkthrough: Creating a Master/Detail Form Using Two Windows Forms DataGridView Controls。

它显示了你想要做的事情。

您将看到该示例将DataSet绑定到绑定到主DGV的BindingSource，并且详细信息DGV绑定到另一个BindingSource，该BindingSource本身被发现到主BindingSource。这就是你如何获得DGV之间的主 - 细节关系。

<强>更新
这将取代你的button1_Click：

private void button1_Click(object sender, EventArgs e) {
    BindingSource masterBindingSource = new BindingSource();
    BindingSource detailsBindingSource = new BindingSource();

    masterBindingSource.DataSource = CreateTableAndFill();
    masterBindingSource.DataMember = "Header";

    dataGridView1.DataSource = masterBindingSource;

    detailsBindingSource.DataSource = masterBindingSource;
    detailsBindingSource.DataMember = "ID_FK";

    dataGridView2.DataSource = detailsBindingSource;
}

DataGridView不会掠过详细记录而忽略外键关系

2 个答案: