问题标签 [databound-controls]
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c# - 在 XML 加载后，DataGridView 无法将行添加为“控件是数据绑定的”
我通过加载到数据集从 XML 文件填充了 DataGridView。但是，在我加载数据后，我无法再在运行时插入行，因为我收到此错误：
“当控件绑定数据时，无法以编程方式将行添加到 datagridview 的行集合中”
我理解我认为的问题的概念。如果我的 XML 文件只包含 7 行并且是 DataGridView 的源，那么它绑定到 7 行并且不能添加更多行，但我希望用户能够动态更改它然后重新保存 XML。我可以知道如何重新保存，只是不知道如何“解锁”行问题。
非常感谢，汤姆
c# - Accessing ComboBox.Items with Contains method for DataBound ComboBox
Summary:
I want to check the current ComboBox.text value against the list of items in a ComboBox that is assigned a DataSource at run time. If the text doesn't match an item in the list then it will select the first item in the list.
Here is what I originally tried:
However the above code does not work as expected because when inspecting the myComboBox.Items property at run time, it is actually a collection of System.Data.DataRowView objects. So basically it is comparing a String to DataRowView.ToString() which is always false unless the myComboBox.Text value is in fact "System.Data.DataRowView"...
So I thought
"Hey, lets make an extension method to search all the items of the DataViewRow and see if my requested value is in there!", but it's not going as planned...
I know that looks weird, but the code prettify won't work right if the <Extension()> part isn't separated. When I attempt to use my extension method in my main code, I get an error about my extension method not being a member of ComboBox.ObjectCollection which seems bogus to me because in the extension method I am specifically saying that the first parameter is a ComboBox.ObjectCollection.
Infamous "HOW TO BRAIN SURGERY WITH POTATO" request...
How can I determine that the text a user inputs into a databound ComboBox is in the list of items from the DataSource?
Side note: C# answers are fine so long as they have a VB.NET counterpart
c# - Gridview dataBound 从后面的代码中添加到列数据的超链接
使用网格视图从后面的代码绑定它：
我想将一个特定的列数据绑定到一个超链接中，所以当它点击它应该进行下载。
怎么做 ？
下面是我的代码：
asp.net - 访问嵌套 UpdatePanel 内的模型绑定项
访问嵌套 UpdatePanel 内的数据绑定项的正确方法是什么？我最近发现了模型绑定并喜欢它提供的强类型绑定，但我在整个页面中散布着 UpdatePanel，它似乎破坏了对Item对象的访问。如果整个数据绑定控件都在 UpdatePanel 内，我没有问题。这有效：
但如果 UpdatePanel 在绑定控件内，我将无法再访问Item. 这不起作用：
CS0103：当前上下文中不存在名称“项目”
我摸索到了一个笨重的解决方案，就是这个
但我非常希望这不是完成任务的最佳方式。
.net - 是否需要调度程序来更改 WPF .Net Core 3 或更高版本中的数据绑定属性？
许多示例（甚至来自 MS）使用调度程序来更新数据绑定属性，并且可以找到一堆不同的答案。是否存在“官方”声明？目前，我总是使用调度程序，并且只有在我确定这是一个官方功能并且它仍然适用于未来的 .Net 版本时，我才会更改它。