如何解决从代码后面填充ASPxTextBox和ASPxListBox
|| 即时通讯为项目使用Devexpress ASPxGridView,但在使用数据填充自定义EditForm时遇到问题。 看起来如下<Templates>
<EditForm>
Company Name:
<dx:ASPxTextBox ID=\"CompanyName\" runat=\"server\" Value=\"<% #Bind(\'CompanyName\') %>\" />
Parent:
<dx:ASPxListBox ID=\"ParentGuid\" runat=\"server\" Value=\"<% #Bind(\'ParentGuid\') %>\" />
</EditForm>
</Templates>
通常我会写类似
protected void ASPxGridView1_StartRowEditing(object sender,DevExpress.Web.Data.ASPxStartRowEditingEventArgs e)
{
var CompanyList = db.companies.OrderBy(x => x.CompanyName).ToList();
ASPxListBox ParentGuid = (ASPxListBox)ASPxGridView1.FindControl(\"ParentGuid\");
ParentGuid.DataSource = CompanyList;
ParentGuid.DataBind();
ASPxTextBox CompanyName = (ASPxTextBox)ASPxGridView1.FindControl(\"CompanyName\");
CompanyName.Text = \"Some company name\";
}
但这行不通。有什么建议从哪里开始?该文档并没有真正涵盖自定义表单:/
谢谢!
==更新==
尝试使用onhtmleditformcreated = \“ ASPxGridView1_HtmlEditFormCreated \”和方法
protected void ASPxGridView1_HtmlEditFormCreated(object sender,ASPxGridViewEditFormEventArgs e)
{
Control CompanyName = ASPxGridView1.FindEditFormTemplateControl(\"CompanyName\");
if (CompanyName != null)
{
ASPxTextBox CompanyNameEdit = CompanyName as ASPxTextBox;
CompanyName.Text = \"Some Co\";
}
}
我使用Value = \“ <%#Bind(\'CompanyName \')%> \”的事实使事情有些混乱。如果我删除“绑定”,则将填充框,但随后无法获取其中的数据。可以解决吗?
解决方法
您应该使用稍微不同的方法:
使用HtmlEditFormCreated事件来设置编辑器属性。要获取编辑器实例,请使用gridView \的FindEditFormTemplateControl方法。
, 答案是...
填充名为CompanyList的ASPxComboBox
protected void ASPxGridView1_HtmlEditFormCreated(object sender,ASPxGridViewEditFormEventArgs e)
{
Control ParentGuidControl = ASPxGridView1.FindEditFormTemplateControl(\"ParentGuid\");
if (ParentGuidControl != null)
{
ASPxComboBox ParentGuid = (ASPxComboBox)ParentGuidControl;
var CompanyList = db.companies.OrderBy(x => x.CompanyName);
ParentGuid.TextField = \"CompanyName\";
ParentGuid.ValueField = \"CompanyGuid\";
ParentGuid.DataSource = CompanyList;
ParentGuid.DataBind();
}
}
但!
如果您有一个像我一样的自定义表格
<Templates>
<EditForm>
Company Name:
<dx:ASPxTextBox ID=\"CompanyName\" runat=\"server\" Value=\"<% #Bind(\'CompanyName\') %>\" />
Parent:
<dx:ASPxComboBox ID=\"ParentGuid\" runat=\"server\" Value=\"<% #Bind(\'ParentGuid\') %>\" />
</EditForm>
</Templates>
您将无法从代码后面填充它,因此#bind方法将覆盖所有其他传入值。但是,如果您不打算从后面的代码中填充它们,那么这是一个巧妙的技巧来获取数据...
protected void ASPxGridView1_RowInserting(object sender,DevExpress.Web.Data.ASPxDataInsertingEventArgs e)
{
IDictionaryEnumerator enumerator = e.NewValues.GetEnumerator();
string CompanyName = string.Empty;
Guid ParentGuid = Guid.Empty;
enumerator.Reset();
while (enumerator.MoveNext())
if (enumerator.Key.ToString() == \"CompanyName\")
CompanyName = enumerator.Value.ToString();
else if (enumerator.Key.ToString() == \"ParentGuid\")
ParentGuid = new Guid(enumerator.Value.ToString());
// Do insert trick here
}
但是,如果您想从代码后面填充一些表单值,请确保EditForm中没有#bind方法
<Templates>
<EditForm>
Company Name:
<dx:ASPxTextBox ID=\"CompanyName\" runat=\"server\" />
Parent:
<dx:ASPxComboBox ID=\"ParentGuid\" runat=\"server\" />
</EditForm>
</Templates>
按照文章顶部的说明进行填充,并获取类似的值
protected void ASPxGridView1_RowInserting(object sender,DevExpress.Web.Data.ASPxDataInsertingEventArgs e)
{
string CompanyName = string.Empty;
Guid ParentGuid = Guid.Empty;
// This method is a bit more secure
Control CompanyNameControl = ASPxGridView1.FindEditFormTemplateControl(\"CompanyName\");
if (CompanyNameControl != null)
{
ASPxTextBox CompanyNameTb = (ASPxTextBox)CompanyNameControl;
CompanyName = CompanyNameTb.Text.ToString();
}
// A bit less secure,but lesser code
ASPxComboBox ParentGuidControl = (ASPxComboBox)ASPxGridView1.FindEditFormTemplateControl(\"ParentGuid\");
ParentGuid = new Guid(ParentGuidControl.SelectedItem.Value.ToString());
// Do insert...
}
玩得开心
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