Exception on search within TreeSelect.

[LukaMajcenic]

Describe the bug

Exception gets thrown when using search on TreeSelect component.

Steps to reproduce (please include code)

Use <TitleTemplate> fragment instead of Title attribute on <TreeNode> element to reproduce the issue.

<TreeSelect TItem="string" TItemValue="string"
			Style="width:100%;"
			@bind-Values="values"
			DropdownStyle="max-height:400px;overflow:auto;"
			Placeholder="Please select"
			AllowClear
			Multiple
			TreeDefaultExpandAll
			EnableSearch
			MatchedStyle="font-weight: bold">
	<TreeNode TItem="string" Key="parent 1" Title="parent 1">
		<TreeNode TItem="string" Key="parent 1-0" Title="parent 1-0">
			<TreeNode TItem="string" Key="leaf1" Title="my leaf" />
			<TreeNode TItem="string" Key="leaf2" Title="your leaf" />
		</TreeNode>
		<TreeNode TItem="string" Key="parent 1-1" Title="parent 1-1">
			<TreeNode TItem="string" Key="leaf3">
                            <TitleTemplate>
                                <b Style="color:#08c;">leaf3</b>
                            </TitleTemplate>
                        </TreeNode>
		</TreeNode>
	</TreeNode>
</TreeSelect>

Exceptions (if any)

object reference not set to an instance of an object

in Where.cs

Further technical details

• AntDesign Nuget Package version: 0.19.0
• .NET SDK version: 8.0.202

[LukaMajcenic]

One workaround if you want to use <TitleTemplate> is to add Title as well.

<TreeNode TItem="string" Key="leaf3" Title="leaf3">
                            <TitleTemplate>
                                <b Style="color:#08c;">leaf3</b>
                            </TitleTemplate>
                        </TreeNode>

Unfortunatelly, this is not possible if generating using TreeData, making the TreeData feature UNUSABLE.

[LukaMajcenic]

The problem is not present in 0.18.3

[ElderJames]

Thanks for contacting us @LukaMajcenic , set the Title parameter is the right way for searching the node with TitleTemplate.

Did you want the TreeData also support TitleTemplate?

[LukaMajcenic]

Did you want the TreeData also support TitleTemplate?

I'm not sure that would solve anything. The whole point of TreeData is to generate tree without the need for <TreeNode>.