帮助从GridView获取所选行的值 [英] Help on getting the value of selected row from GridView

问题描述

大家好，



请接受我糟糕的节目，因为我是.Net世界的新手。



以下是GridView的aspx代码，它显示用户在数据库中完成的搜索结果。

Hi all,

Kindly bear with my poor programming as I am new to .Net world.

Following is a aspx code for GridView which displays results of search done in the database by user.

<div>
    <asp:GridView ID="gvwKeyList" runat="server" AutoGenerateColumns="False" EmptyDataText="No data available."

        onrowcommand="GridView_RowCommand"

        CssClass="table table-striped table-condensed" BorderStyle="None" AlternatingRowStyle-BackColor="#C0DC3B">
        <Columns>
            <asp:TemplateField>
                <ItemTemplate>
                    <asp:Button ID="b1" runat="server" Text="Attach?" CommandName="Select" class="btn btn-primary" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:BoundField DataField="key_id" HeaderText="Key Id" />
            <asp:BoundField DataField="key_no" HeaderText="Key No" />
            <asp:BoundField DataField="hook" HeaderText="Hook" />
            <asp:BoundField DataField="access_description" HeaderText="Accessible?" />
            <asp:BoundField DataField="key_type_description" HeaderText="Key Type" />
            <asp:BoundField DataField="key_location" HeaderText="Key Location" />
        </Columns>
        <SelectedRowStyle BackColor="LightCyan" ForeColor="DarkBlue" Font-Bold="true" />
    </asp:GridView>

这个工作正常，我可以轻松地显示它。这是一个代码。

This is working fine and I can easily display it. Here is a code for it.

protected void search_keys(object sender, EventArgs e)
{
    string key = txt_key_no.Text;
    string hook = txt_hook.Text;

    List<Key> lstKey = new List<Key>();

    key_dal objDAL = new key_dal();
    lstKey = objDAL.GetKeyListByKeyHook(key, hook);

    gvwKeyList.DataSource = lstKey;
    gvwKeyList.GridLines = GridLines.None;

    gvwKeyList.DataBind();
}

当我想在用户点击附加？时获取Key_id的值时，问题就出现了。按钮。无论我尝试过什么方法，我总是会遇到错误。我无法得到RowIndex。以下是GridView_RowCommand方法的代码

My problem starts when I want to get the value of "Key_id" when user clicks on "Attach?" button. No matter what method I have tried I am always getting an error. I cannot get the RowIndex. Here is the code for "GridView_RowCommand" method

protected void GridView_RowCommand(Object sender, GridViewCommandEventArgs e)
{
    if (e.CommandName == "Select")
    {
        // Convert the row index stored in the CommandArgument
        // property to an Integer.
        int index = Convert.ToInt32(e.CommandArgument);

        // Get the last name of the selected author from the appropriate
        // cell in the GridView control.
        GridViewRow selectedRow = gvwKeyList.Rows[index];
        TableCell contactName = selectedRow.Cells[1];
        string contact = contactName.Text;

        // Display the selected text.
        Message.Text = "You selected " + contact + ".";
    }

}

请有人请指导我的错误。我不介意我是否必须放弃这种方式并采取新的更好的方法。



非常感谢提前



对不起。有人正确地指出我的意思是我总是得到一个错误。这是我最后4个小时的挫折，使我无法做出任何事情。这些是我试过的各种各样的东西，但总是得到一个null异常错误。

Can somebody please please guide me my mistake. I don't mind if I have to abandon this way and take up something new and better if available.

Many thanks in advance

Sorry. Somebody pointed out correctly that what do I mean by "I am always getting an error". It was my last 4 hours of frustration which prevented me from assuming things. These are the
various things I tried but always got a null Exception error.

//int rowindex = gvwKeyList.SelectedRow.RowIndex;
    //string stVal = gvwKeyList.Rows[rowindex].Cells[1].ToString();

OR
    //int selectedrowindex = gvwKeyList.SelectedRow.RowIndex;
    //GridViewRow selectedRow = gvwKeyList.Rows[selectedrowindex];
    //string stVal = Convert.ToString(selectedRow.Cells[1].ToString());
OR
    //GridViewRow row = gvwKeyList.SelectedRow;

    //GridViewRow clik = ((Button)sender).NamingContainer as GridViewRow;
    //string stVal = clik.FindControl("key_id").ToString();
OR
    // Determine the index of the selected row.
    //int index = gvwKeyList.SelectedIndex;
    //int selected_key_id = Convert.ToInt32(gvwKeyList.DataKeys[index].Value);
    //int selected_key_id = Convert.ToInt16(gvwKeyList.SelectedRow.Cells[1].Text);

Message.Text = "The primary key value of the selected row is " + stVal + ".";

我终于放弃了它们并选择了protected void GridView_RowCommand方法，它给了我一个输入字符串格式不正确 错误。我想要的只是一行中我点击按钮的值

I finally abandoned them and went for the "protected void GridView_RowCommand" method which gave me a "Input string was not in a correct format" error. All I want is a value from the row where I click the button

推荐答案

所以看来你的主要问题是无法获得GridView的OnRow命令事件中的行索引..对吗？



如果是这样，那么以下链接肯定可以解决您的问题。



看看吧。





获取Asp.net Rowcommand事件的行索引



AND



gridview rowCommand中的行索引



i希望你能轻松获得 key_id 获取行索引后，虽然有任何进一步的问题，请更新您的问题，并发表评论。





：）

So it seems that your main problem is "Failed to get the Row index in OnRow Command Event of the Gridview" .. Right?

if it is so, than following links can surely solve your problem.

Do have a look at .


Get Row Index on Asp.net Rowcommand event

AND

row index in gridview rowCommand

i hope you will be easily able to get the key_id after getting the row index, Though incase of any further issue, Do update your question, and Leave a comment Please.


:)

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