WinForms: How to Implement Custom ToolTip Behavior for a DataGridView Based on Cell Value
I'm working through a tutorial and I've been struggling with this for a few days now and could really use some help. I'm working on a project and hit a roadblock. I'm currently working on a WinForms application using .NET Framework 4.8, and I'm trying to implement a custom ToolTip behavior for a DataGridView. The requirement is to show different ToolTips based on the value of the cell. For example, if a cell contains a negative value, I want the ToolTip to display a warning message, and if the value is above a certain threshold, a different message should appear. I've tried using the `DataGridView.CellMouseEnter` event to set the ToolTip text, but it seems like the ToolTip doesn't appear as expected, and sometimes it shows the default ToolTip instead. Here is my current implementation: ```csharp private void dataGridView1_CellMouseEnter(object sender, DataGridViewCellEventArgs e) { if (e.RowIndex >= 0 && e.ColumnIndex >= 0) { var cellValue = dataGridView1[e.ColumnIndex, e.RowIndex].Value; string toolTipText = string.Empty; if (cellValue != null && decimal.TryParse(cellValue.ToString(), out decimal value)) { if (value < 0) { toolTipText = "Warning: Negative value!"; } else if (value > 100) { toolTipText = "Info: Value exceeds 100!"; } } toolTip1.SetToolTip(dataGridView1[e.ColumnIndex, e.RowIndex], toolTipText); } } ``` Additionally, I’ve set up a `ToolTip` component named `toolTip1` on the form. However, the tooltips sometimes appear delayed or not at all when hovering over the cells. I have also tried adjusting the `AutoPopDelay` property of the ToolTip, but it didn't resolve the issue. Am I missing something in the event handling, or is there a better way to achieve the desired behavior? What could be causing these inconsistencies in the ToolTip display? How would you solve this? This is my first time working with Csharp latest. What would be the recommended way to handle this?