如何在DetailsView数据绑定事件中修改数据 [英] how to modify data in a DetailsView Databound event

问题描述

我在aspx页面中使用了带sqldatasource的detailsview.我正在尝试对某些字段进行一些预处理和后期处理-基本上是将html列表转换为换行符分隔的列表以进行编辑，然后再返回html以存储在数据库中.

I'm using a detailsview with an sqldatasource in the aspx page. I'm trying to do some pre and post processing on some of the fields - basically to convert a html list to a newline separated list for editing and back to html to store in the database.

ItemUpdating中的后处理很容易，但是DataBound中的前处理却很杂乱...

The post-processing in ItemUpdating is easy enough but the pre-processing in DataBound is messy...

protected void DetailsView1_DataBound(object sender, EventArgs e)
{
    if (DetailsView1.Rows.Count > 2)
    {
        string s =((DataRowView)DetailsView1.DataItem).Row.ItemArray[2].ToString();


        TextBox box1 = (TextBox) DetailsView1.FindControl("textbox1");
        if (box1 != null)
        {
            box1.Text = preprocess(s);
        }
    }
}

它的脆弱性

字符串s =(((DataRowView)DetailsView1.DataItem).Row.ItemArray [2] .ToString();

这让我不高兴.我确定我缺少明显的东西(不止一件事)！

that upsets me. I'm sure I am missing something (more than one thing) obvious!

我想我希望做更多像我的ItemUpdating ...

I guess I was hoping to do something more like my ItemUpdating...

e.NewValues ["threeline"] =后处理(e.NewValues ["threeline"].ToString());

推荐答案

切换到Asp.Net 4.0+并使用 ObjectDataSource .

Switch to Asp.Net 4.0+ and use ObjectDataSource.

将 ObjectDataSource.TypeName 设置为数据访问对象 Type.FullName .
将 ObjectDataSource.DataObjectTypeName 设置为DTO Type.FullName .
将 ObjectDataSource.SelectMethod 设置为获取 IQueryable< MyDto> 的数据访问对象方法.将 DetailsView1.DataSourceID 设置为 ObjectDataSource.ID .
将 DetailsView1.ItemType 设置为DTO Type.FullName .

Set ObjectDataSource.TypeName to the data access object Type.FullName.
Set ObjectDataSource.DataObjectTypeName to the DTO Type.FullName.
Set ObjectDataSource.SelectMethod to the data access object method that get a IQueryable<MyDto>. Set DetailsView1.DataSourceID to ObjectDataSource.ID.
Set DetailsView1.ItemType to the DTO Type.FullName.

并做了这样的事情:

var item = DetailsView1.DataItem as MyDTO;
if(item == null)
    return;

var box1 = (TextBox) DetailsView1.FindControl("textbox1");
if (box1 == null)
    return;

box1.Text = preprocess(item.PropertyName);

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