部署代码中的WPF绑定错误 [英] WPF Binding Error in Deployment Code
本文介绍了部署代码中的WPF绑定错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在部署代码中获取错误，因为对ReportTemplateVM类型的构造函数的调用与指定的绑定约束相匹配引发了异常"
我已经实现了MVVM模式.
DXGrid正在显示记录&其项目源属性绑定在各自的视图模型构造函数中
模型文件
Getting Error in deployment code as "The invocation of the constructor on type ReportTemplateVM matches specified binding constraints threw an exception"
I have implemented MVVM pattern.
DXGrid is showing records & its item source property in binded in respective view models constructor
Model file
namespace ReportGenerator.Models
{
internal class ReportTemplateModel:INotifyPropertyChanged
{
#region Public Porperties
private DataTable gridData;
public DataTable GridData
{
get { return gridData; }
set
{
gridData = value;
OnPropertyChanged("GridData");
}
}
}查看模型文件
View Model file
namespace ReportGenerator.ViewModels
{
internal class ReportTemplateVM
{
ReportDocument O_Report = new ReportDocument();
CrystalReportViewer rptViewer = new CrystalReportViewer();
WindowsFormsHost host = new WindowsFormsHost();
ReportData rptData = new ReportData();
public static int selectedID;
IDBManager objDbManager = new DBManager(DataProvider.SqlServer);
public ReportTemplateModel rptTempModel { get; set; }
public ReportTemplateVM()
{
//This data will load as the default Data from the ReportTemplateModel attached to the view
// LoadGrid();
}
#region Methods
/// <summary>
/// Methods for set data to grid on load as well as when Refresh
/// </summary>
public void LoadGrid()
{
try
{
rptTempModel = new ReportTemplateModel { GridData = rptData.GetData() };
}
catch (Exception ex)
{
DXMessageBox.Show(ex.Message);
}
}查看文件
<usercontrol x:class="ReportGenerator.Views.ucReports" xmlns:x="#unknown"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
mc:Ignorable="d"
xmlns:cn="clr-namespace:ReportGenerator.Commands"
xmlns:ws="clr-namespace:Microsoft.Reporting.WinForms;assembly=Microsoft.ReportViewer.WinForms"
xmlns:crystal="clr-namespace:CrystalDecisions.Windows.Forms;assembly=CrystalDecisions.Windows.Forms"
xmlns:my="clr-namespace:SAPBusinessObjects.WPF.Viewer;assembly=SAPBusinessObjects.WPF.Viewer"
d:DesignHeight="778" d:DesignWidth="1100" xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"
xmlns:dxdo="http://schemas.devexpress.com/winfx/2008/xaml/docking"
xmlns:local="clr-namespace:ReportGenerator.Views"
xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"
xmlns:vm="clr-namespace:ReportGenerator.ViewModels">
<stackpanel height="700">
<stackpanel.datacontext>
<vm:reporttemplatevm xmlns:vm="#unknown" />
</stackpanel.datacontext>
<textblock>Hi</textblock>
<dxdo:docklayoutmanager name="dockLayoutManager1" height="700" width="1100" maxwidth="1050" maxheight="700" minheight="50" minwidth="50" horizontalcontentalignment="Stretch" xmlns:dxdo="#unknown">
<dxdo:docklayoutmanager.floatgroups>
<dxdo:floatgroup floatlocation="1.77874186550974,1" floatsize="995,282" height="290" orientation="Vertical">
<dxdo:layoutpanel height="290" margin="0" maxsize="1100,290" padding="0" width="1100">
<stackpanel width="995" margin="0" height="250" orientation="Vertical">
<stackpanel margin="1,1,1,1">
<dxg:gridcontrol x:name="Grid1" dockpanel.dock="Top" width="985" height="195" verticalalignment="Stretch" horizontalalignment="Stretch" autopopulatecolumns="True" allowdrop="True" margin="5" isrecursiveexpand="True" autoexpandallgroups="True" maxwidth="995" maxheight="500" minwidth="50" minheight="50" uselayoutrounding="True" panel.zindex="1" xmlns:dxg="#unknown">
<dxg:gridcontrol.view>
<dxg:tableview name="view" autowidth="True" visibility="Visible" navigationstyle="Row" allowmoving="True" showgrouppanel="False" />
</dxg:gridcontrol.view>
</dxg:gridcontrol>
</stackpanel>
<stackpanel height="35" orientation="Horizontal" width="995"
<Button Background="LightBlue" Content="_Refresh" Height="23" IsHitTestVisible="True" Margin="5" Name="Refresh" Opacity="1" Visibility="Visible" Width="90"/>
<Button Background="LightBlue" Content="_Add New Report" Height="23" IsHitTestVisible="True" Margin="5" Name="btnAddRow" Opacity="1" Visibility="Visible" Width="90" />
<Button Background="LightBlue" Content="_Update" Height="23" IsHitTestVisible="True" Margin="5" x:Name="Update" Opacity="1" Visibility="Visible" Width="90"/>
<Button Background="LightBlue" Content="_Delete" Height="23" IsHitTestVisible="True" Margin="5" Name="Delete" Opacity="1" Visibility="Visible" Width="90"/>
<Button Background="LightBlue" Content="_Generate Report" Height="23" IsHitTestVisible="True" Margin="5" Name="btnRptGenerate" Opacity="1" Visibility="Visible" Width="90"/>
<Button Background="LightBlue" Content="Preview" Height="23" IsHitTestVisible="True" Margin="5" Name="btnPreview" Opacity="1" Visibility="Visible" Width="90"/>
</stackpanel>
</stackpanel>
</dxdo:layoutpanel>
</dxdo:floatgroup>
<dxdo:floatgroup floatlocation="179.522388059701,382" floatsize="995,250" margin="0">
<dxdo:layoutpanel caption="Report Preview" height="460" padding="0" width="1000" margin="0" maxsize="1100,460">
<stackpanel x:name="ParentStack" margin="0">
<contentcontrol height="460" width="985" margin="0" padding="0" name="Report" />
</stackpanel>
</dxdo:layoutpanel>
</dxdo:floatgroup>
</dxdo:docklayoutmanager.floatgroups>
</dxdo:docklayoutmanager>
</stackpanel>
</usercontrol>推荐答案
It looks like you are using xpo[^] - why don''t you bind directly to an XPCollection or XPQuery?
最好的问候
Espen Harlinn
It looks like you are using xpo[^] - why don''t you bind directly to an XPCollection or XPQuery?
Best regards
Espen Harlinn
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