数据网格图像列可编程添加wpf

本文关键字：可编程 添加 wpf 图像 数据网 网格 数据 | 更新日期: 2023-09-27 18:10:36

我正在寻找如何以编程方式添加显示图像的列到数据网格的方法。我一直在寻找如何找到解决办法，但一直没有成功。

我现在是这样做的:

DataGridTemplateColumn col1 = new DataGridTemplateColumn();
col1.Header = "Betaald";
FrameworkElementFactory factory1 = new FrameworkElementFactory(typeof(System.Windows.Controls.Image));
Binding b1 = new Binding("Picture") { Mode = BindingMode.TwoWay };
factory1.SetBinding(System.Windows.Controls.Image.SourceProperty, b1);
DataTemplate cellTemplate1 = new DataTemplate();
cellTemplate1.VisualTree = factory1;
col1.CellTemplate = cellTemplate1;
dtgVerkoopsdocumenten.Columns.Add(col1);

这将创建一个列，我可以在其中显示图像。我从数据库中获取的所有数据，存储在列中，如下所示:

System.Windows.Controls.Image image = new System.Windows.Controls.Image(); //this is on top of my class
MySqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
    string naam = getKlant(reader.GetInt32(2));
    if (reader.GetBoolean(7) == false)
    {
        BitmapImage betalen = new BitmapImage(new Uri("/WpfApplication1;component/Images/false.png", UriKind.Relative));
        image.Source = betalen;
    }
    else
    {
        BitmapImage betalen = new BitmapImage(new Uri("/WpfApplication1;component/Images/true.png", UriKind.Relative));
        image.Source = betalen;
    }
    dtgVerkoopsdocumenten.Items.Add(new DataItem
    {
        ID = reader.GetInt32(1),
        klant = naam,
        netto = reader.GetDouble(3),
        btw = reader.GetDouble(4),
        bruto = reader.GetDouble(5),
        datum = reader.GetDateTime(6).ToString("dd-MM-yyyy"),
        soort2 = soort,
        Picture = image
        });
    }
    reader.Close();

DataItem是一个自己创建的类，我存储在所有的绑定中:

//more code, but the one below is the one I'm talking about
public System.Windows.Controls.Image Picture { get; set; }

我现在什么都得不到。但是我没有得到任何错误。

所以我的问题是:我如何才能将图像存储到数据网格中，而不必过多地使用xaml文件。

输出:

System.Windows.Data Error: 1 : Cannot create default converter to perform 'two-way' conversions between types 'System.Windows.Controls.Image' and 'System.Windows.Media.ImageSource'. Consider using Converter property of Binding. BindingExpression:Path=Picture; DataItem='DataItem' (HashCode=435249); target element is 'Image' (Name=''); target property is 'Source' (type 'ImageSource')
System.Windows.Data Error: 5 : Value produced by BindingExpression is not valid for target property.; Value='System.Windows.Controls.Image' BindingExpression:Path=Picture; DataItem='DataItem' (HashCode=435249); target element is 'Image' (Name=''); target property is 'Source' (type 'ImageSource')
System.Windows.Data Error: 1 : Cannot create default converter to perform 'two-way' conversions between types 'System.Windows.Controls.Image' and 'System.Windows.Media.ImageSource'. Consider using Converter property of Binding. BindingExpression:Path=Picture; DataItem='DataItem' (HashCode=45279885); target element is 'Image' (Name=''); target property is 'Source' (type 'ImageSource')
System.Windows.Data Error: 5 : Value produced by BindingExpression is not valid for target property.; Value='System.Windows.Controls.Image' BindingExpression:Path=Picture; DataItem='DataItem' (HashCode=45279885); target element is 'Image' (Name=''); target property is 'Source' (type 'ImageSource')

数据网格图像列可编程添加wpf

您应该使用SetBinding方法而不是SetValue，因为您是将绑定分配给属性，而不是为属性分配值。

来自:

factory1.SetValue(System.Windows.Controls.Image.SourceProperty, b1);

: 

factory1.SetBinding(System.Windows.Controls.Image.SourceProperty, b1);

你的绑定语句也可以写成:

Binding b1 = new Binding("Picture") { Mode = BindingMode.TwoWay };
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