blocks|key|862212|text|如果这不起作用，为什么不简单地在字典上执行foreach循环，将所有条目添加到combobox中？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|862213|foreach(var+item+in+userCache)
{
++++userListComboBox.Items.Add(new+ListItem(item.Key,+item.Value));
}|code-block|syntax|javascript|862214|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If this doesn't work why not simply do a foreach loop over the dictionary adding all the items to the combobox?

<pre><code>foreach(var item in userCache)
{
 userListComboBox.Items.Add(new ListItem(item.Key, item.Value));
}
</code></pre>

blocks|key|862256|text|SortedDictionary<string,+int>+userCache+=+new+SortedDictionary<string,+int>
{
++{"a",+1},
++{"b",+2},
++{"c",+3}
};
comboBox1.DataSource+=+new+BindingSource(userCache,+null);
comboBox1.DisplayMember+=+"Key";
comboBox1.ValueMember+=+"Value";|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|862257|但是为什么要将ValueMember设置为"Value"，难道不应该将它绑定到"Key“(以及将DisplayMember绑定到"Value”)吗？|unstyled|offset|length|style|CODE|862258|entityMap^0|0|7|B|1C|D|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]|$G|Q|H|R|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|S|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>SortedDictionary&lt;string, int&gt; userCache = new SortedDictionary&lt;string, int&gt;
{
 {"a", 1},
 {"b", 2},
 {"c", 3}
};
comboBox1.DataSource = new BindingSource(userCache, null);
comboBox1.DisplayMember = "Key";
comboBox1.ValueMember = "Value";
</code></pre>

But why are you setting the <code>ValueMember</code> to "Value", shouldn't it be bound to "Key" (and <code>DisplayMember</code> to "Value" as well)?

blocks|key|862311|text|字典不能直接用作数据源，您应该做更多的事情。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|862312|SortedDictionary<string,+int>+userCache+=++UserCache.getSortedUserValueCache();
KeyValuePair<string,+int>+[]+ar=+new+KeyValuePair<string,int>[userCache.Count];
userCache.CopyTo(ar,+0);
comboBox1.DataSource+=+ar;+new+BindingSource(ar,+"Key");+//This+line+is+causing+the+error
comboBox1.DisplayMember+=+"Value";
comboBox1.ValueMember+=+"Key";|code-block|syntax|javascript|862313|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A dictionary cannot be directly used as a data source, you should do more.

<pre><code>SortedDictionary&lt;string, int&gt; userCache = UserCache.getSortedUserValueCache();
KeyValuePair&lt;string, int&gt; [] ar= new KeyValuePair&lt;string,int&gt;[userCache.Count];
userCache.CopyTo(ar, 0);
comboBox1.DataSource = ar; new BindingSource(ar, "Key"); //This line is causing the error
comboBox1.DisplayMember = "Value";
comboBox1.ValueMember = "Key";
</code></pre>

blocks|key|645139|text|我使用了Sorin+Comanescu的解决方案，但在尝试获取所选值时遇到了问题。我的组合框是一个工具条组合框。我使用了"+combobox“属性，它公开了一个普通的combobox。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|645140|我有一个|645141|+Dictionary<Control,+string>+controls+=+new+Dictionary<Control,+string>();|code-block|syntax|javascript|645142|绑定代码(Sorin+Comanescu的解决方案-工作起来很棒)：|645143|+controls.Add(pictureBox1,+"Image");
+controls.Add(dgvText,+"Text");
+cbFocusedControl.ComboBox.DataSource+=+new+BindingSource(controls,+null);
+cbFocusedControl.ComboBox.ValueMember+=+"Key";
+cbFocusedControl.ComboBox.DisplayMember+=+"Value";|645144|问题是，当我试图获取选定的值时，我没有意识到如何检索它。经过几次尝试，我得到了这样的结果：|645145|+var+control+=+((KeyValuePair<Control,+string>)+cbFocusedControl.ComboBox.SelectedItem).Key|645146|希望对其他人有所帮助！|645147|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

I used Sorin Comanescu's solution, but hit a problem when trying to get the selected value. My combobox was a toolstrip combobox. I used the "combobox" property, which exposes a normal combobox.

I had a 

<pre><code> Dictionary&lt;Control, string&gt; controls = new Dictionary&lt;Control, string&gt;();
</code></pre>

Binding code (Sorin Comanescu's solution - worked like a charm):

<pre><code> controls.Add(pictureBox1, "Image");
 controls.Add(dgvText, "Text");
 cbFocusedControl.ComboBox.DataSource = new BindingSource(controls, null);
 cbFocusedControl.ComboBox.ValueMember = "Key";
 cbFocusedControl.ComboBox.DisplayMember = "Value";
</code></pre>

The problem was that when I tried to get the selected value, I didn't realize how to retrieve it. After several attempts I got this:

<pre><code> var control = ((KeyValuePair&lt;Control, string&gt;) cbFocusedControl.ComboBox.SelectedItem).Key
</code></pre>

Hope it helps someone else!

blocks|key|645165|text|userListComboBox.DataSource+=+userCache.ToList();
userListComboBox.DisplayMember+=+"Key";|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|645166|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>userListComboBox.DataSource = userCache.ToList();
userListComboBox.DisplayMember = "Key";
</code></pre>

blocks|key|862415|text|++++++++var+colors+=+new+Dictionary+<+string,+string+>+();
++++++++colors["10"]+=+"Red";|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|862416|绑定到组合框|unstyled|862417|++++++++comboBox1.DataSource+=+new+BindingSource(colors,+null);
++++++++comboBox1.DisplayMember+=+"Value";
++++++++comboBox1.ValueMember+=+"Key";+|862418|完整源代码...Dictionary+as+a+Combobox+Datasource|offset|length|862419|Jeryy|862420|entityMap|0|LINK|mutability|MUTABLE|url|http://csharp.net-informations.com/dataset/dataset-combobox.htm^0|0|0|0|8|Z|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|Z|8|@]|9|@$K|10|L|11|1|12]]|A|$]]|$1|M|3|N|5|F|7|13|8|@]|9|@]|A|$]]|$1|O|3|-4|5|F|7|14|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

<pre><code> var colors = new Dictionary &lt; string, string &gt; ();
 colors["10"] = "Red";
</code></pre>

Binding to Combobox

<pre><code> comboBox1.DataSource = new BindingSource(colors, null);
 comboBox1.DisplayMember = "Value";
 comboBox1.ValueMember = "Key"; 
</code></pre>

Full Source...<a href="http://csharp.net-informations.com/dataset/dataset-combobox.htm">Dictionary as a Combobox Datasource</a>

Jeryy

blocks|key|862459|text|使用-->|type|unstyled|depth|inlineStyleRanges|entityRanges|data|862460|comboBox1.DataSource+=+colors.ToList();|code-block|syntax|javascript|862461|除非将字典转换为列表，否则组合框无法识别其成员。|862462|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Use --> 

<pre><code>comboBox1.DataSource = colors.ToList();
</code></pre>

Unless the dictionary is converted to list, combo-box can't recognize its members.

blocks|key|862479|text|试着这样做……|type|unstyled|depth|inlineStyleRanges|entityRanges|data|862480|SortedDictionary<string,+int>+userCache+=+UserCache.getSortedUserValueCache();

++++//+Add+this+code
++++if(userCache+!=+null)
++++{
++++++++userListComboBox.DataSource+=+new+BindingSource(userCache,+null);+//+Key+=>+null
++++++++userListComboBox.DisplayMember+=+"Key";
++++++++userListComboBox.ValueMember+=+"Value";
++++}|code-block|syntax|javascript|862481|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Just Try to do like this....

<pre><code>SortedDictionary&lt;string, int&gt; userCache = UserCache.getSortedUserValueCache();

 // Add this code
 if(userCache != null)
 {
 userListComboBox.DataSource = new BindingSource(userCache, null); // Key =&gt; null
 userListComboBox.DisplayMember = "Key";
 userListComboBox.ValueMember = "Value";
 }
</code></pre>

blocks|key|862513|text|我知道这是一个相当古老的话题，但我也有同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|862514|我的解决方案是：|862515|如何填充组合框：|862516|foreach+(KeyValuePair<int,+string>+item+in+listRegion)
{
++++combo.Items.Add(item.Value);
++++combo.ValueMember+=+item.Value.ToString();
++++combo.DisplayMember+=+item.Key.ToString();
++++combo.SelectedIndex+=+0;
}|code-block|syntax|javascript|862517|这就是我们进入内部的方式：|862518|+MessageBox.Show(combo_region.DisplayMember.ToString());|862519|我希望它能帮助一些人|862520|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|X|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

I know this is a pretty old topic, but I also had a same problem.

My solution:

how we fill the combobox:

<pre><code>foreach (KeyValuePair&lt;int, string&gt; item in listRegion)
{
 combo.Items.Add(item.Value);
 combo.ValueMember = item.Value.ToString();
 combo.DisplayMember = item.Key.ToString();
 combo.SelectedIndex = 0;
}
</code></pre>

and that's how we get inside:

<pre><code> MessageBox.Show(combo_region.DisplayMember.ToString());
</code></pre>

I hope it help someone

I'm using .NET 2.0 and I'm trying to bind a combobox's Datasource to a sorted dictionary.

So the error I'm getting is "DataMember property 'Key' cannot be found on the Datasource".

<pre><code> SortedDictionary&lt;string, int&gt; userCache = UserCache.getSortedUserValueCache();
 userListComboBox.DataSource = new BindingSource(userCache, "Key"); //This line is causing the error
 userListComboBox.DisplayMember = "Key";
 userListComboBox.ValueMember = "Value";
</code></pre>

Binding Combobox Using Dictionary as the Datasource

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在使用.NET 2.0，并尝试将组合框的数据源绑定到排序字典。所以我得到的错误是“在数据源上找不到DataMember属性'Key‘”。 SortedDictionary<string, int> userCache = UserCache.getSortedUserValueCache(); ...

问使用字典作为数据源的绑定组合框
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