"edit"
单击 my 上的按钮时ASPxGridView
,将触发StartRowEditing 事件。发生这种情况时,我设置了一个名为的局部变量,"IsEditing"
这样当CellEditorIntialize触发时,我可以为我的comboboxes
. 我这样做是因为如果用户按下取消,该CellEditorInitialize
事件会再次触发,并且由于combobox
不可用,我得到一个空引用问题。
我需要为"new"
按钮做同样的事情,但没有"StartSrowInserting"
事件。
有任何想法吗?
这是 C# 中的服务器代码。
这是 StartRowEditingEvent:
protected void gvLocation_StartRowEditing(object sender, DevExpress.Web.Data.ASPxStartRowEditingEventArgs e)
{
this.IsEditing = true; //There's not editing property in this event, so everytime it fires, we'll set this flag to true
if (e.Cancel) //And we'll only set the flag to false when canceling
this.IsEditing = false;
}
当我单击 ASPxGridView 上的“编辑”按钮时,会触发此事件。它将将该变量设置为true。如果用户取消对话框,它将设置为 false。
然后当控件初始化时,CellEditorInitialize 事件触发。
protected void gvLocation_CellEditorInitialize(object sender, DevExpress.Web.ASPxGridView.ASPxGridViewEditorEventArgs e)
{
e.Column.EditFormSettings.Visible = DevExpress.Utils.DefaultBoolean.False;
if (this.IsEditing) //Only populate fields when editing
{
if (e.Column.FieldName == "LocationPK")
e.Editor.Visible = false; //We don't want LocationPK to be updated
else if (e.Column.FieldName == "ShalePlay")
{
ASPxComboBox combo = (ASPxComboBox)e.Editor;
mcCommon.Setup(ref combo, true, LookupValuesShalePlay.List, "Description", "PK");
}
else if (e.Column.FieldName == "FieldType")
{
ASPxComboBox combo = (ASPxComboBox)e.Editor;
mcCommon.Setup(ref combo, true, LookupValuesFieldType.List, "Description", "PK");
}
else if (e.Column.FieldName == "County")
{
ASPxComboBox combo = (ASPxComboBox)e.Editor;
mcCommon.Setup(ref combo, true, LookupValuesCounty.List, "Description", "PK");
}
else if (e.Column.FieldName == "State")
{
ASPxComboBox combo = (ASPxComboBox)e.Editor;
mcCommon.Setup(ref combo, true, LookupValuesState.List, "Description", "PK");
}
else
{
}
}
}
我确定哪个控件是哪个并分配数据源。如果我不使用那个标志,当用户取消编辑时,它会抛出一个空异常。插入时,当用户单击“新建”或“取消”时也会触发此事件。但是在 CellEditorInitiliaze 触发之前,我找不到在单击“新建”按钮时触发的事件。
因此,当用户单击“新建”和“取消”按钮时,我需要一种方法来设置该标志,这样我就可以设置该标志。
这是 ASPxGridView 的标记。
<dx:ASPxGridView
ID="gvLocation"
runat="server"
AutoGenerateColumns="False"
DataSourceID="edsLocations"
ClientInstanceName="gvLocation"
ViewStateMode="Disabled"
KeyFieldName="LocationPK"
Width="600px"
OnCellEditorInitialize="gvLocation_CellEditorInitialize"
OnCommandButtonInitialize="gvLocation_CommandButtonInitialize"
OnStartRowEditing="gvLocation_StartRowEditing"
>
<ClientSideEvents BeginCallback="
function(s, e) {loadingPanel.Show();}"
EndCallback="
function(s, e) {loadingPanel.Hide();}" />
<Columns>
<dx:GridViewDataHyperLinkColumn FieldName="LocationPK" ReadOnly="True" VisibleIndex="0" Visible="false">
<PropertiesHyperLinkEdit TextField="LocationPK" />
</dx:GridViewDataHyperLinkColumn>
<dx:GridViewDataTextColumn FieldName="LocationName" VisibleIndex="1">
<DataItemTemplate>
<a href="javascript:void(0);" onclick="gvLocation_LinkClick('<%# Container.VisibleIndex %>');"><%# DataBinder.Eval(Container.DataItem,"LocationName") %></a>
</DataItemTemplate>
</dx:GridViewDataTextColumn>
<dx:GridViewDataComboBoxColumn FieldName="FieldType" VisibleIndex="2">
<PropertiesComboBox TextField="FieldType" ValueField="FieldType" />
</dx:GridViewDataComboBoxColumn>
<dx:GridViewDataComboBoxColumn FieldName="State" VisibleIndex="4">
<PropertiesComboBox ValueField="State" TextField="State" />
</dx:GridViewDataComboBoxColumn>
<dx:GridViewDataComboBoxColumn FieldName="CountyName" VisibleIndex="3">
<PropertiesComboBox ValueField="CountyName" TextField="CountyName" ValueType="System.String" DataSourceID="edsCounty" />
</dx:GridViewDataComboBoxColumn>
<dx:GridViewDataComboBoxColumn FieldName="ShalePlay" VisibleIndex="5">
<PropertiesComboBox ValueField="ShalePlay" TextField="ShalePlay" />
</dx:GridViewDataComboBoxColumn>
<dx:GridViewCommandColumn VisibleIndex="6">
<EditButton Visible="True">
</EditButton>
<NewButton Visible="True">
</NewButton>
</dx:GridViewCommandColumn>
</Columns>
<Settings ShowFilterBar="Visible" ShowFilterRow="True" ShowGroupPanel="True" />
<SettingsBehavior AllowFocusedRow="True" />
<SettingsLoadingPanel Mode="Disabled" />