从ASP.NET GridView获取DataRow

时间:2009-08-20 15:31:30

标签: c# asp.net gridview event-handling datarow

我有一个ASP.NET GridView绑定到ObjectDataSource(绑定到MySQL数据库)。在这个网格上,我有2个未绑定的ButtonField列,我想触发服务器端事件。因此,我在GridView的{​​{1}}事件中添加了一个事件处理程序方法。

在所述eventhandler的代码中,我需要以某种方式获取用户点击的基础RowCommand。但是,我似乎无法让这个工作;如果我使用如下代码,则DataRow变量始终为selectedRow

null

我用Google搜索并找到http://ranafaisal.wordpress.com/2008/03/31/how-to-get-the-current-row-in-gridview-row-command-event之类的网页,但我找不到任何内容。我很确定我只是遗漏了一些明显的东西,但我无法弄清楚是什么......

如果有帮助,这是ASP.NET代码:

protected void searchResultsGridView_RowCommand(object sender, GridViewCommandEventArgs e)
{
  CallDataRow selectedRow = (CallDataRow) searchResultsGridView.Rows[Convert.ToInt32(e.CommandArgument)].DataItem;
}

5 个答案:

答案 0 :(得分:4)

最后通过以下方式让它发挥作用:

  1. 添加包含绑定HiddenField的TemplateField。

    <asp:TemplateField ShowHeader="False">
      <ItemTemplate>
        <asp:HiddenField ID="audioFileName" runat="server" Value='<%# Eval("AudioFileName") %>' />
      </ItemTemplate>
    </asp:TemplateField>
    
  2. 在RowCommand事件处理程序中添加以下代码:

    protected void searchResultsGridView_RowCommand(object sender, GridViewCommandEventArgs e)
    {
      string audioFile = ((HiddenField) searchResultsGridView.Rows[Convert.ToInt32(e.CommandArgument)].FindControl("audioFileName")).Value;
    }
    
  3. 这是一个淤泥,它并不是特别安全,但它有效,这就是我现在所需要的。尽管如此,仍然欢迎任何更好的解决方案......

答案 1 :(得分:3)

我甚至迟到了派对!但是当我从谷歌来到这里时,有些人可能仍会打这个,所以我会给出答案:

protected void SomeDataGrid_RowDataBound(object sender, GridViewRowEventArgs e)
{
   if (e.Row.RowType == DataControlRowType.DataRow)
   {
       System.Data.DataRowView dr = (System.Data.DataRowView)e.Row.DataItem;
       string aVar = dr["DataFieldIdLikePlease"].ToString();
   }
}

那么你就可以获得代码隐藏中的任何数据字段。

答案 2 :(得分:1)

 int index = Convert.ToInt32(e.CommandArgument);

 GridViewRow row = searchResultsGridView.Rows[index];

答案 3 :(得分:1)

我意识到这已经晚了2。5年(抱歉!之前没有看到它......),但我使用两个静态/共享方法直接转换行。也许这就是你想要做的事情?

VB.Net:

Public Shared Function GridViewRowToDataRow(ByVal gvr As GridViewRow) As DataRow
    Dim di As Object = Nothing
    Dim drv As DataRowView = Nothing
    Dim dr As DataRow = Nothing

    If gvr IsNot Nothing Then
        di = TryCast(gvr.DataItem, System.Object)
        If di IsNot Nothing Then
            drv = TryCast(di, System.Data.DataRowView)
            If drv IsNot Nothing Then
                dr = TryCast(drv.Row, System.Data.DataRow)
            End If
        End If
    End If

    Return dr
End Function

Public Shared Function GridViewRowEventArgsToDataRow(ByVal e As GridViewRowEventArgs) As DataRow
    Dim gvr As GridViewRow = Nothing
    Dim di As Object = Nothing
    Dim drv As DataRowView = Nothing
    Dim dr As DataRow = Nothing

    If e.Row.RowType = DataControlRowType.DataRow Then
        gvr = TryCast(e.Row, System.Web.UI.WebControls.GridViewRow)
        dr = Helpers.GridViewRowToDataRow(gvr)
    End If

    Return dr
End Function

C#.Net(使用:http://www.developerfusion.com/tools/convert/vb-to-csharp/转换):

public static DataRow GridViewRowToDataRow(GridViewRow gvr)
{
    object di = null;
    DataRowView drv = null;
    DataRow dr = null;

    if (gvr != null) {
        di = gvr.DataItem as System.Object;
        if (di != null) {
            drv = di as System.Data.DataRowView;
            if (drv != null) {
                dr = drv.Row as System.Data.DataRow;
            }
        }
    }

    return dr;
}

public static DataRow GridViewRowEventArgsToDataRow(GridViewRowEventArgs e)
{
    GridViewRow gvr = null;
    object di = null;
    DataRowView drv = null;
    DataRow dr = null;

    if (e.Row.RowType == DataControlRowType.DataRow) {
        gvr = e.Row as System.Web.UI.WebControls.GridViewRow;
        dr = Helpers.GridViewRowToDataRow(gvr);
    }

    return dr;
}

答案 4 :(得分:0)

干净的方法似乎是使用&#34; DataKeyNames&#34; GridView上的属性。数据源应包含一个列,该列是唯一标识符或主键。然后,您可以将gridview上的DataKeyNames属性设置为该属性的名称。

然后,在RowCommand中可以使用与所选行对应的列的值,它可用于确保将命令应用于唯一标识的对象

<asp:GridView ID="gridview" runat="server" ... DataKeyNames="pkey">


protected void gridview_OnRowCommand(object sender, EventArgs e)        
{
    string selectedPkey = null;
    GridViewCommandEventArgs  gridEvent = (GridViewCommandEventArgs)e;
    int index = Convert.ToInt32(gridEvent.CommandArgument);
    if (index >= 0 && index < gridview.Rows.Count)
    {
        GridViewRow r = gridview.Rows[index];
        selectedPkey = gridview.DataKeys[index].Value.ToString();
    }