如何在 TableLayoutPanel 中间添加行

Question

如何在 TableLayoutPanel 中间添加行

winformsuser-controlstablelayoutpanel

5

我有一个包含3列和1行的TableLayoutPanel：（删除按钮，用户控件，添加按钮）

我想让“添加”按钮在所点击的按钮下方添加一行类似于上面的行：例如：之前：

1. (删除按钮1，用户控件2，添加按钮1) 2. (删除按钮2，用户控件2，添加按钮2)

点击“添加按钮1”后：

1. (删除按钮1，用户控件2，添加按钮1) 2. (删除按钮3，用户控件3，添加按钮3) 3. (删除按钮2，用户控件2，添加按钮2)

我设法将行添加到tablelayoupanel的末尾，但无法添加到中间：它会破坏布局。以下是事件处理程序的片段：

void MySecondControl::buttonAdd_Click( System::Object^ sender, System::EventArgs^ e )
{
   int rowIndex = 1 + this->tableLayoutPanel->GetRow((Control^)sender);

   /* Remove button */
   Button^ buttonRemove = gcnew Button();
   buttonRemove->Text = "Remove";
   buttonRemove->Click += gcnew System::EventHandler(this, &MySecondControl::buttonRemove_Click);

   /* Add button */
   Button^ buttonAdd = gcnew Button();
   buttonAdd->Text = "Add";
   buttonAdd->Click += gcnew System::EventHandler(this, &MySecondControl::buttonAdd_Click);

   /*Custom user control */
   MyControl^ myControl = gcnew MyControl();

   /* Add the controls to the Panel. */
   this->tableLayoutPanel->RowCount += 1;
   this->tableLayoutPanel->Controls->Add(buttonRemove, 0, rowIndex);
   this->tableLayoutPanel->Controls->Add(myControl, 1, rowIndex);
   this->tableLayoutPanel->Controls->Add(buttonAdd, 2, rowIndex);
}

这个无法正常工作。

我是不是做错了什么？有什么建议吗？

- Eldad

1个回答

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- Eldad · Accepted Answer

最终找到了解决方案：不要将控件添加到直接位置，而是将它们添加到末尾，然后使用SetChildIndex()函数将控件移动到所需位置：

void MySecondControl::buttonAdd_Click( System::Object^ sender, System::EventArgs^ e )
{
   int childIndex = 1 + this->tableLayoutPanel->Controls->GetChildIndex((Control^)sender);

   /* Remove button */
   Button^ buttonRemove = gcnew Button();
   buttonRemove->Text = "Remove";
   buttonRemove->Click += gcnew System::EventHandler(this, &MySecondControl::buttonRemove_Click);

   /* Add button */
   Button^ buttonAdd = gcnew Button();
   buttonAdd->Text = "Add";
   buttonAdd->Click += gcnew System::EventHandler(this, &MySecondControl::buttonAdd_Click);

   /*Custom user control */
   MyControl^ myControl = gcnew MyControl();

   /* Add the controls to the Panel. */
   this->tableLayoutPanel->Controls->Add(buttonRemove);
   this->tableLayoutPanel->Controls->Add(myControl);
   this->tableLayoutPanel->Controls->Add(buttonAdd);

   /* Move the controls to the desired location */
   this->tableLayoutPanel->Controls->SetChildIndex(buttonRemove, childIndex);
   this->tableLayoutPanel->Controls->SetChildIndex(myControl, childIndex + 1);
   this->tableLayoutPanel->Controls->SetChildIndex(buttonAdd, childIndex + 2);
}