绑定复选框不会更新其数据源

Question

我有一个复选框，谁的选中值绑定到绑定到一个布尔数据表列的绑定源。当我点击我的保存按钮将我的数据表中的更改推送到我的sql服务器时，数据表中的值永远不会改变。

设计者代码。

this.cbxKeepWebInfinityChanges = new System.Windows.Forms.CheckBox(); 
this.preProductionBindingSource = new System.Windows.Forms.BindingSource(); 
// 
// cbxKeepWebInfinityChanges 
// 
this.cbxKeepWebInfinityChanges.AutoSize = true; 
this.cbxKeepWebInfinityChanges.DataBindings.Add(new System.Windows.Forms.Binding("Checked", this.preProductionBindingSource, "WEBINFINTY_CHANGES", true, System.Windows.Forms.DataSourceUpdateMode.OnPropertyChanged)); 
this.cbxKeepWebInfinityChanges.Location = new System.Drawing.Point(6, 98); 
this.cbxKeepWebInfinityChanges.Name = "cbxKeepWebInfinityChanges"; 
this.cbxKeepWebInfinityChanges.Size = new System.Drawing.Size(152, 17); 
this.cbxKeepWebInfinityChanges.TabIndex = 30; 
this.cbxKeepWebInfinityChanges.Text = "Keep WebInfinity Changes"; 
this.cbxKeepWebInfinityChanges.UseVisualStyleBackColor = true; 
this.cbxKeepWebInfinityChanges.CheckedChanged += new System.EventHandler(this.CauseApplyChangesActivation); 
// 
// preProductionBindingSource 
// 
this.preProductionBindingSource.AllowNew = false; 
this.preProductionBindingSource.DataMember = "PreProduction"; 
this.preProductionBindingSource.DataSource = this.salesLogix; 

节省代码

//the comments are the debugger values before the call in going from checked when loaded to unchecked when saved. 
private void btnApplyChanges_Click(object sender, EventArgs e) 
{ 
    (...) // non related saving logic for other controls 
    preProductionBindingSource.EndEdit(); // checked = false, databinding = true, datatable = true 
    preProductionTableAdapter.Update(salesLogix.PreProduction); // checked = false, databinding = true, datatable = true 
} 

同样的事情会从选中到选中时发生。其他项目绑定到相同的数据绑定源（我有两个组合框）正在更新。

编辑 - 添加cbxKeepWebInfinityChanges.DataBindings["Checked"].WriteValue();之前preProductionBindingSource.EndEdit();没有改变任何东西。

Answer 1

我正在使用Dathan的建议another one of my questions，我试图将数据库中的文本是/否字段绑定到此复选框。我将其更改回普通查询，并使用Binding.Parse和Binding.Format并解决了我的问题。

这是一些示例代码。

Public Form1() 
{ 
    InitializeComponent(); 
    cbxKeepWebInfinityChanges.DataBindings["Checked"].Parse += new ConvertEventHandler(cbxKeepWebInfinityChanges_Parse); 
    cbxKeepWebInfinityChanges.DataBindings["Checked"].Format += new ConvertEventHandler(cbxKeepWebInfinityChanges_Format); 
} 

void cbxKeepWebInfinityChanges_Parse(object sender, ConvertEventArgs e) 
{ 
    if ((bool)e.Value == true) 
     e.Value = "Yes"; 
    else 
     e.Value = "No"; 
} 
void cbxKeepWebInfinityChanges_Format(object sender, ConvertEventArgs e) 
{ 
    if ((string)e.Value == "Yes") 
     e.Value = true; 
    else 
     e.Value = false; 
}