C# BindingSource 获取当前行
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BindingSource Get Current Row
提问by
I cannot get current row value. How can i do?
我无法获取当前行值。我能怎么做？
bindingSource1.DataSource = LData; (LData is Generic List)
bindingSource1.DataSource = LData; (LData is Generic List)
public DataRow currentRow
{
get
{
int position = this.BindingContext[bindingSource1].Position;
if (position > -1)
{
return ((DataRowView)bindingSource1.Current).Row;
}
else
{
return null;
}
}
}
I cannot get current row with :
我无法获得当前行：
MessageBox.Show(currentRow["NAME"].ToString());
Getting Err: InvalidCastException, how can i do? Thanks.
出现错误：InvalidCastException，我该怎么办？谢谢。
采纳答案by Damir Arh
You can't expect to have DataRowobjects in bindingSource1.Currentif you're setting DataSourceto a List<T>instead of to a DataTable. In your case bindingSource1.Currentwill contain an instance of the generic type.
如果您设置为 a而不是a DataRow，bindingSource1.Current则不能期望有对象。在您的情况下将包含泛型类型的实例。DataSourceList<T>DataTablebindingSource1.Current
I suppose you're initializing LData like this:
我想你是这样初始化 LData 的：
LData = new List<T>();
The property should then look like this:
该属性应如下所示：
public T currentRow
{
get
{
int position = this.BindingContext[bindingSource1].Position;
if (position > -1)
{
return (T)bindingSource1.Current;
}
else
{
return null;
}
}
}
And you could read the value like this (assuming Nameis a property of T):
您可以像这样读取值（假设Name是 的属性T）：
MessageBox.Show(currentRow.Name);
Not tested of course, but something like this should work. Use the debugger in the following line to see what the contents of the Currentproperty are actually like:
当然没有经过测试，但这样的事情应该可以工作。使用以下行中的调试器查看Current属性的内容实际是什么样的：
return (T)bindingSource1.Current;
