我有DataGrid的值。我想检查每个单元格，如果值不在两个数字（限制）之间，我想将背景更改为红色。 DataGrid的每列的限制都不同。我试图通过更改ColumnStyle的{{1}}方法中的OnAutoGeneratingColumn来实现它，但到目前为止我还没有成功。你能看看我的代码有什么问题吗？
DataGrid方法：
OnAutoGeneratingColumn protected override void OnAutoGeneratingColumn(DataGridAutoGeneratingColumnEventArgs e)
{
//The first yolumn with date I dont want to alter
if (Columns.Count == 0)
{
base.OnAutoGeneratedColumns(e);
}
else {
//Trigger to chech if the number is lower than the bottom limit
DataTrigger lowerTrigger = new DataTrigger();
lowerTrigger.Binding = new Binding("Content")
{
Converter = new LessThanConverter(),
ConverterParameter = SelectedDevices[this.Columns.Count - 1].minValue
};
lowerTrigger.Value = "True";
lowerTrigger.Setters.Add(new Setter(DataGridCell.BackgroundProperty, Brushes.Red));
//Trigger to check if the number is higher than the top limit
DataTrigger higherTrigger = new DataTrigger();
higherTrigger.Binding = new Binding("Content")
{
Converter = new LessThanConverter(),
ConverterParameter = SelectedDevices[this.Columns.Count - 1].maxValue
};
higherTrigger.Value = "False";
higherTrigger.Setters.Add(new Setter(DataGridCell.BackgroundProperty, Brushes.Red));
//Multi triger to check, whether the number is between the tow limits
MultiDataTrigger betweenTrigger = new MultiDataTrigger();
Condition conditionMin = new Condition();
conditionMin.Binding = new Binding("Content")
{
Converter = new LessThanConverter(),
ConverterParameter = SelectedDevices[this.Columns.Count-1].minValue
};
conditionMin.Value = "False";
Condition conditionMax = new Condition();
conditionMax.Binding = new Binding("Content")
{
Converter = new LessThanConverter(),
ConverterParameter = SelectedDevices[this.Columns.Count - 1].maxValue
};
conditionMax.Value = "True";
betweenTrigger.Conditions.Add(conditionMax);
betweenTrigger.Conditions.Add(conditionMin);
betweenTrigger.Setters.Add(new Setter(DataGridCell.BackgroundProperty, Brushes.Blue));
Style style = new Style(typeof(DataGridCell));
style.Triggers.Add(lowerTrigger);
//style.Triggers.Add(betweenTrigger);
style.Triggers.Add(higherTrigger);
e.Column.CellStyle = style;
base.OnAutoGeneratedColumns(e);
}
}
类：
LessThanConverter答案 0 :(得分：1)
所以最后我找到了解决方案。我的错误是，无法像我new Binding("Content")那样绑定转换器的值。正确的解决方案是将它绑定到列的名称，这可以在运行时使用e.Column.Header.ToString()完成，而不是工作！