asp.net gridview的复选框选择 [英] asp.net gridview checkbox selection

问题描述

需要一些帮助来解决这个问题。

我有一个GridView和GridView控件里我有一个复选框，并单击复选框后，我做了回发事件，并试图只是对数据库更新此特定的行。

这是我的GridView的复选框，code。看到OnCheckedChanged。

 ＆LT; ASP：模板列HEADERTEXT =样本＆GT;
  ＆LT;的ItemTemplate＆GT;
     ＆LT; ASP：复选框=服务器
                   ID =chkSample
                   选中='＆LT;％＃绑定（样本）％＆GT;
                   OnCheckedChanged =UpdateSupplyLed
                   的AutoPostBack =真＆GT;
    ＆LT; / ASP：复选框＆GT;
  ＆LT; / ItemTemplate中＆GT;
＆LT; / ASP：的TemplateField＆GT;
 

code：

 保护无效UpdateSupplyLed（对象发件人，EventArgs的）
{
    的foreach（在SamplingGridView.Rows GridViewRow迪）
    {
        复选框chkBx =（复选框）di.FindControl（chkSample）;
        如果（chkBx = NULL和放大器;！＆安培; chkBx.Checked）
        {
            //这里更新数据库逻辑。
        }
    }
}
 

以上code正常工作，但它让我所有的检查，我只是检查了一个irresepective复选框。我不希望所有的人。

我怎样才能被刚刚选中的只有一行值。某些行可能已经被确认已经因为状态是如此的记录，我不希望更新这些记录。

我想我已经得到了我的问题吧！

更新：答案是：

 保护无效UpdateSupplyLed（对象发件人，EventArgs的）
{
    复选框chkSampleStatus =发件人为复选框;
    布尔样本= chkSampleStatus.Checked;
    GridViewRow行= chkSampleStatus.NamingContainer为GridViewRow;
    文本框txtId = row.FindControl（ID）的文本框;
    INT ID = Int32.Parse（txtId.Text）;
}
 

解决方案

试试这个：

 复选框chkBx =发件人为复选框;
 

而不是迭代的所有行。

我还没有使用复选框在以这种方式自己一个GridView。通常我会用GridView的OnRowCommand事件，而不是和使用则rowIndex或CommandArgument值更新数据库。

关于它的思考OnRowcommand可能会非常棘手的复选框火，一个更好的解决方案可能与复选框的CheckChanged活动贴合，使用控制NamingContainer导航到GridViewRow服务器端。是这样的：

  GridViewRow行= chkBx.NamingContainer为GridViewRow;
 

我假设的那张复选框=>小区=>行，如果你谷歌ASP.NET NamingContainer你会得到一些更多的细节。

Need some help to solve this.

I have a gridview and inside the gridview I have a checkbox and after clicking the checkbox, I am doing a postback event and trying to update this particular row only on the database.

This is my gridview checkbox code. see the OnCheckedChanged.

<asp:TemplateField HeaderText="Sample">
  <ItemTemplate>
     <asp:CheckBox runat="server" 
                   ID="chkSample" 
                   Checked='<%# Bind("Sample") %>' 
                   OnCheckedChanged="UpdateSupplyLed" 
                   AutoPostBack="True">
    </asp:CheckBox> 
  </ItemTemplate>
</asp:TemplateField>

Code:

protected void UpdateSupplyLed(object sender, EventArgs e)
{
    foreach (GridViewRow di in SamplingGridView.Rows)    
    {        
        CheckBox chkBx = (CheckBox)di.FindControl("chkSample");
        if (chkBx != null && chkBx.Checked)
        {
            //update database logic here.
        }
    }
}

The above code works fine but it is getting me all the checkboxes that are checked irresepective of the one that I just checked. I don't want all of them.

How can I get the only one row value that have been just checked. Some of the rows might have been checked already because the status is true for those records and I don't want to update those records.

I think I've got my question right!

Update: The answer is:

protected void UpdateSupplyLed(object sender, EventArgs e)
{
    CheckBox chkSampleStatus = sender as CheckBox;        
    bool sample = chkSampleStatus.Checked;            
    GridViewRow row = chkSampleStatus.NamingContainer as GridViewRow;        
    TextBox txtId = row.FindControl("Id") as TextBox;            
    int id = Int32.Parse(txtId.Text);
}

解决方案

Try this:

CheckBox chkBx = sender as CheckBox;

Rather than iterate all the rows.

I haven't used CheckBox's in a GridView in this way myself. Usually I would use the GridView's OnRowCommand event instead and use the RowIndex or CommandArgument value to update the database.

Thinking about it OnRowcommand could be tricky for a CheckBox to fire, a better solution might be sticking with the CheckChanged event of the checkbox and navigate up to the GridViewRow serverside using controls NamingContainer. Something like:

GridViewRow row = chkBx.NamingContainer as GridViewRow;

I'm assuming the goes CheckBox => Cell => Row if you Google ASP.NET NamingContainer you'll get some more specifics.

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