具有相同数据源的两个 ComboBox 导致 Selection 被遗忘

Question

我已经BindingSource定义了：

public System.Windows.Forms.BindingSource bsContractors;
this.bsContractors.DataSource = typeof(Contractor);

然后是 ComboBox 和 DataSource 定义如下：

private System.Windows.Forms.ComboBox cmbConstructionContractors1;
this.cmbConstructionContractors1.DataBindings.Add(new System.Windows.Forms.Binding("SelectedValue", this.bsProject, "Id", true));
this.cmbContractors1.DataSource = this.bsContractors;
this.cmbContractors1.DisplayMember = "Name";
this.cmbContractors1.ValueMember = "Id";
this.cmbContractors1.SelectedIndexChanged += new System.EventHandler(this.cmbContractor1Selected);

这很好用。我使用相同的数据源在另一个 Form 上定义了另一个 ComboBox：

this.cmbContractorName2.DataBindings.Add(new System.Windows.Forms.Binding("SelectedValue", myView.bsProject, "Id", true));
this.cmbContractorName2.DataSource = projectView.bsContractors;
this.cmbContractorName2.ValueMember = "Id";
this.cmbContractorName2.DisplayMember = "Name";
this.cmbContractorName2.SelectedIndexChanged += new System.EventHandler(this.cmbContractor2Selected);

当显示第二个 ComboBox 时，已选择内容的第一个 ComboBox 将重置为第一个条目，该条目为空白。如果我下拉第一个 ComboBox，列表仍然存在，只是 'forgot' 选择了哪个。

编辑：我发现当显示第二个 ComboBox 时，第一个 ComboBox1 的 EventHandler 以某种方式分配给 cmbContractors2Selected 而不是原来的 cmbContractors1Selected

Answer 1

尝试给它自己的绑定对象：

this.cmbContractorName2.DataSource = new BindingSource(projectView.bsContractors, null);

这将分离货币经理。

具有相同数据源的两个 ComboBox 导致 Selection 被遗忘

Two ComboBox with same DataSource causes Selection to be forgotten

c#

winforms

combobox

bindingsource