ASP GridView控件得到按一下按钮行值

问题描述

我在做什么 - 在ImageButton的点击重置用户密码

完成迄今为止 - 添加GridViewCommandEventHandler - 它能否正常触发。使用code从 MSDN 。我得到一个空字符串（）为我e.CommandArgument，并运行（无法解析时，它抛出一个错误，为int）。

我可以在调试器中看到有一个rowIndex位置属性存储（正确为我的点击）其他在电子，我可以访问此？我想MSDN的code将工作 - 有没有别的东西，我已经做了，使这个错误发生，或者另一种方式来解决它？谢谢你。

 无效resetpassword（对象发件人，GridViewCommandEventArgs E）
{
    //如果使用多个ButtonField字段柱，使用
    // CommandName属性，以确定哪个按钮被点击。
    如果（e.CommandName ==resetpass）
    {
        //将存储在CommandArgument行索引
        //属性为整数。
        INT指数= Convert.ToInt32（e.CommandArgument）;        //检索包含点击按钮的行
        //从行集合的用户。使用
        // CommandSource属性来访问GridView控件。
        GridView控件GridView1 =（GridView控件）e.CommandSource;
        GridViewRow行= GridView1.Rows [指数]        。字符串usrname = row.FindControl（用户名）的ToString（）;
 

aspx页面code：

 ＆LT; ASP：的TemplateField的HeaderText =重设密码＆GT;
                ＆LT;＆ItemTemplate中GT;
                    ＆LT; ASP：ImageButton的ID =ibtnReset=服务器的CausesValidation =假
                        的CommandName =resetpass的ImageUrl =〜/图片/ glyphicons_044_keys.png文本=按钮/＆GT;
                ＆LT; / ItemTemplate中＆GT;
                ＆LT; HeaderStyle宽度=70像素/＆GT;
                ＆LT; ItemStyle Horizo​​ntalAlign =中心/＆GT;
            ＆LT; / ASP：的TemplateField＆GT;
 

事件增加code：

 保护无效GridView1_RowCreated（对象发件人，GridViewRowEventArgs E）
    {
        GridView1.RowCommand + =新GridViewCommandEventHandler（this.resetpassword）;
    }
 

解决方案

无论是通过 CommandArgument （假设你想通过所谓的主键字段 PK ）

 ＆LT; ASP：的TemplateField＆GT;
    ＆LT;＆ItemTemplate中GT;
      ＆LT; ASP：ImageButton的=服务器ID =ibtnReset
        文本=重设密码
        的CommandName =resetpass
        CommandArgument ='＆LT;％＃的eval（PK）％GT;'
    ＆LT; / ItemTemplate中＆GT;
  ＆LT; / ASP：的TemplateField＆GT;
 

或获得的 GridViewRow 通过 NamingContainer 你的的ImageButton ：

  WebControl的WC = e.CommandSource为WebControl的;
GridViewRow行= wc.NamingContainer为GridViewRow;
字符串usrname =（（文本框）row.FindControl（用户名））文本。
 

您也可以通过为rowIndex位置CommandArgument：

  CommandArgument ='＆LT;％＃Container.DataItemIndex％GT;'
 

的 ButtonField字段类自动填充相应的索引值 CommandArgument 属性。对于其他命令按钮，您必须手动设置命令按钮的 CommandArgument 属性。

What I'm doing - reset user password on imagebutton click.

Done so far - added GridViewCommandEventHandler - it's firing correctly. Using code from MSDN. I'm getting an empty string ("") for my e.CommandArgument, and it's throwing an error when running (can't parse "" to int).

I can see in the debugger there is a 'rowIndex' property being stored (correctly for my click) elsewhere in e, can I access this? I would think MSDN's code would work - is there something else I've done to make this error occur or another way to fix it? Thanks.

void resetpassword(Object sender, GridViewCommandEventArgs e)
{
    // If multiple ButtonField columns are used, use the
    // CommandName property to determine which button was clicked.
    if (e.CommandName == "resetpass")
    {
        // Convert the row index stored in the CommandArgument
        // property to an Integer.
        int index = Convert.ToInt32(e.CommandArgument);

        // Retrieve the row that contains the button clicked
        // by the user from the Rows collection. Use the
        // CommandSource property to access the GridView control.
        GridView GridView1 = (GridView)e.CommandSource;
        GridViewRow row = GridView1.Rows[index];

        String usrname = row.FindControl("username").ToString();

aspx page code:

<asp:TemplateField HeaderText="Reset Password">
                <ItemTemplate>
                    <asp:ImageButton ID="ibtnReset" runat="server" CausesValidation="false"
                        CommandName="resetpass" ImageUrl="~/Images/glyphicons_044_keys.png" Text="Button" />
                </ItemTemplate>
                <HeaderStyle Width="70px" />
                <ItemStyle HorizontalAlign="Center" />
            </asp:TemplateField>

Event add code:

 protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
    {
        GridView1.RowCommand += new GridViewCommandEventHandler(this.resetpassword);
    }

解决方案

Either pass the CommandArgument(assuming you want to pass the primary key field called PK):

 <asp:TemplateField>
    <ItemTemplate>
      <asp:ImageButton runat="server" ID="ibtnReset"
        Text="reset password"
        CommandName="resetpass"
        CommandArgument='<%# Eval("Pk") %>'
    </ItemTemplate>
  </asp:TemplateField>

or get the reference of the GridViewRow via the NamingContainer of your ImageButton:

WebControl wc = e.CommandSource as WebControl;
GridViewRow row = wc.NamingContainer as GridViewRow;
String usrname = ((TextBox)row.FindControl("username")).Text;

You can also pass the RowIndex as CommandArgument:

CommandArgument='<%# Container.DataItemIndex %>'

The ButtonField class automatically populates the CommandArgument property with the appropriate index value. For other command buttons, you must manually set the CommandArgument property of the command button.

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