DataGridView使用ComboBox绑定到DataTable

Question

我有DataGridView dgvData,它有两列.

1列是DataGridViewComboBoxCell的类型,我将此列链接到人员的DataSource.

人们有名称和ID属性,因此,我将第一列ValueMember作为"ID",将DisplayMember作为"名称".

现在,我想将DataTable链接到DataGridView.DataTable有2列,PeopleName和PeopleCallPhone.

我希望绑定将PeopleName与我的DataGridView的第一列匹配,并将CallPhone绑定到我的DataGridView中的第二列.

在此之后,我希望当我在我的整个DataGridView上循环以仅查找我的第一列的值时,我的意思是人员的ID(来自第1列的数据源 - 人员)

你能帮帮我们吗？

Answer 1

我们假设以下数据库设置:

??????????????????????????????    ???????????????????????????????????
?          People            ?    ?      Your DataTable Info        ?
??????????????????????????????    ???????????????????????????????????
? ID ? Name                  ?    ? PeopleName    ? PeopleCallPhone ?
??????????????????????????????    ???????????????????????????????????
?  1 ? "John Smith"          ?    ? "John Smith"  ? 123-456-7890    ?
?  2 ? "Jane Doe"            ?    ? "Jane Doe"    ? 234-567-8900    ?
?  3 ? "Foo Bar"             ?    ? "Foo Bar"     ? 345-678-9000    ?
?  4 ? "Justin Time"         ?    ? "Justin Time" ? 456-789-0000    ?
?  5 ? "Imma Mann"           ?    ? "Imma Mann"   ? 567-890-0000    ?
??????????????????????????????    ???????????????????????????????????

另外,让我们假设您的数据结构是:

List<People> people = GetPeopleFromDB();
DataTable table = GetDataTableInfoFromDB();

为了使DataTable列"PeopleName"与DataGridViewComboBoxColumn来源相符people,您必须设置DataGridViewComboBoxColumn.DataPropertyName.由于该DataTable列中的值匹配People.Name,因此您必须设置该属性 DataGridViewComboBoxColumn.ValueMember.例如:

var col = new DataGridViewComboBoxColumn();
col.Name = "PeopleName";
col.DataPropertyName = "PeopleName";   // The DataTable column name.
col.HeaderText = "Name";
col.DataSource = people;
col.DisplayMember = "Name";
col.ValueMember = "Name";              // People.Property matching the DT column.
this.dataGridView1.Columns.Add(col);

this.dataGridView1.DataSource = table;
this.dataGridView1.Columns[1].HeaderText = "Phone";

结果:

至于你的第二个问题,要在循环遍历每一行时找到每个条目的ID,你首先要获取ComboBoxColumn的源代码.然后,您可以遍历每一行并使用第一列中的值,在源中查找该值的关联ID.例如:

List<People> ppl = ((DataGridViewComboBoxColumn)this.dataGridView1.Columns[0]).DataSource as List<People>;

foreach (DataGridViewRow row in this.dataGridView1.Rows)
{
    if (row.Index != this.dataGridView1.NewRowIndex)
    {
        var cell = row.Cells[0] as DataGridViewComboBoxCell;
        People person = ppl.SingleOrDefault(p => p.Name == cell.Value.ToString());

        if (person != null)
        {
            Console.WriteLine("{0} {1}, {2}", person.ID, person.Name, row.Cells[1].Value);
        }
    }
}

输出: