将 DataGridViewComboBoxColumn.ValueMember 设置为另一列

Posted 2023-05-08

【中文标题】将 DataGridViewComboBoxColumn.ValueMember 设置为另一列

【英文标题】：Set DataGridViewComboBoxColumn.ValueMember to an other column

【发布时间】：2016-08-04 08:11:15

【问题描述】：

我有一个带有 DataSources 的 DataGridView。一个 ComboBoxColumn 一个 DataSource，整个 DataGridView 一个 DataSource。

如何根据使用“主”数据源设置的 ID 为我的 DataGridViewComboBoxColumn 显示正确的文本？

this.dgvFeinfilter.AutoGenerateColumns = false;
this.dgvFeinfilter.SelectionMode = DataGridViewSelectionMode.RowHeaderSelect;

DataGridViewTextBoxColumn colFFZNr = new DataGridViewTextBoxColumn();
colFFZNr.Name = this.ffznr;
colFFZNr.DataPropertyName = this.ffznr;
colFFZNr.Visible = false;

DataGridViewTextBoxColumn colFFFnr = new DataGridViewTextBoxColumn();
colFFFnr.Name = this.fffnr;
colFFFnr.DataPropertyName = this.fffnr;
colFFFnr.Visible = false;

DataGridViewTextBoxColumn colFFnr = new DataGridViewTextBoxColumn();
colFFnr.Name = this.ffnr;
colFFnr.DataPropertyName = this.ffnr;
colFFnr.Visible = false;

DataGridViewTextBoxColumn colFFPosition = new DataGridViewTextBoxColumn();
colFFPosition.Name = this.ffPosition;
colFFPosition.HeaderText = this.headerReihenfolge;
colFFPosition.DataPropertyName = this.ffPosition;
colFFPosition.Visible = true;

DataGridViewComboBoxColumn colFeinfilter = new DataGridViewComboBoxColumn();
colFeinfilter.DataSource = this.DsView.Tables["Feinfilter"];
colFeinfilter.DropDownStyle = ComboBoxStyle.DropDownList;
colFeinfilter.HeaderText = this.headerFeinfilter;
colFeinfilter.DataPropertyName = this.ffKennung; //this.ffnr;
colFeinfilter.DisplayMember = this.ffKennung;
colFeinfilter.ValueMember = this.ffnr;
colFeinfilter.Name = this.ffKennung;
colFeinfilter.Width = 300;

DataGridViewTextBoxColumn colDelete = new DataGridViewTextBoxColumn();
colDelete.Name = "MarkForDelete";
colDelete.Visible = false;
colDelete.DefaultCellStyle.NullValue = 0;

EnumerableRowCollection<DataRow> query = from zuordnung in this.DsWork.Tables["FFZuordnung"].AsEnumerable()
                                         where zuordnung.Field<Decimal>(this.fffnr) == this.feinfilterfolge.FFFNr
                                         select zuordnung;

DataView newView = query.AsDataView();
this.dgvFeinfilter.DataSource = newView;
this.dgvFeinfilter.Columns.AddRange(colFFPosition, colFeinfilter, colFFZNr, colFFFnr, colFFnr, colDelete);

数据源 1 (this.DsView.Tables["Feinfilter"])：

SELECT
    FFSPNR,    -- id
    FFKENNUNG  -- name
FROM
    Feinfilter
WHERE
    FFKENNUNG IS NOT NULL

数据源 2 (this.DsWork.Tables["FFZuordnung"])：

SELECT
    FFZLFDNR,        --id
    FFSPNR,          --fk
    FFFNr,           --fk
    FFZREIHENFOLGE,  --number
    TSUPDATE         --datetime
FROM
    FFZUORDNUNG

绑定所有（也是不可见的）Columns 后具有正确的值。除非DataGridViewComboBoxColumn。该值为空。如果我将 colFeinfilter.DataPropertyName = this.ffKennung; 更改为 colFeinfilter.DataPropertyName = this.ffnr;，则会显示正确的 ID。但我需要“ffKennung”。

【参考方案1】：

你需要设置

colFeinfilter.DataPropertyName = this.ffnr;
colFeinfilter.DisplayMember = this.ffKennung;

DataPropertyName 的值将定义必须选择的值DisplayMember 的值将用于显示所选值的文本