GridView.Columns.Add VS GridView.Columns.Insert和GirdViewRow.FindControl [英] GridView.Columns.Add vs GridView.Columns.Insert and GirdViewRow.FindControl

问题描述

我注意到的东西，我觉得不可思议。因此，我想获得它的工作原理这样的解释。

I have noticed something that I find weird. Therefore I would like to get an explanation of how it works this way.

我有一个GridView，像这样的：

I have a GridView, like this:

    <asp:GridView ID="_grdFordelinger" runat="server" CssClass="grid" AutoGenerateColumns="False">
        <Columns>
            <asp:TemplateField>
                <HeaderTemplate>
                    Vælg
                </HeaderTemplate>
                <ItemTemplate>
                    <asp:CheckBox ID="FordelingCheckBox" runat="server" />
                </ItemTemplate>
                <ItemStyle HorizontalAlign="Center" />
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

正如你所看到的我只有在这一点上定义的一列，并且该列包含每一行的复选框。
然后，我从我的code通过行添加更多的列后面，后来，当用户点击一个按钮，我环路寻找到复选框得到遏制，像行：

As you can see I only have one column defined at this point, and that column contains a CheckBox for each row. I then add more columns from my code behind, and later on, when the user clicks a button, I loop through the rows to find the rows where the CheckBox has been checked, like:

        foreach (GridViewRow row in _fordelingsSelector.Rows)
        {
            foreach (TableCell cell in row.Cells)
            {
                foreach (Control control in cell.Controls)
                {
                    if(control is CheckBox)
                        Trace.Write("I FOUND A CHECKBOX!!!");
                }
            }
        }

或者

        foreach (GridViewRow row in _fordelingsSelector.Rows)
        {
            var checkBox = (CheckBox) row.FindControl("FordelingCheckBox");

            if (checkBox.Checked)
                Trace.Write("I will now delete fordeling with id: " + row.Cells[1].Text);
        }

我已经尝试了两种方式，两者的工作方式，当我使用添加到Columns.Add在GridView的其他列，如：

I have tried both ways, and both ways work when I add the additional columns to the GridView using Columns.Add, like:

        foreach (var boundField in boundFields)
        {
            _grdFordelinger.Columns.Add(boundField);
        }

不过，我想复选框列是最右边的列，所以我想它不会有所作为添加使用Columns.Insert列，如：

But I would like the CheckBox column to be the rightmost column, so I thought it would not make a difference to add the columns using Columns.Insert, like:

        for (int i = 0; i < boundFields.Count; i++)
        {
            _grdFordelinger.Columns.Insert(i, boundFields[i]);
        }

但现在我无法找到使用code以上了（现在更改从1到0的单元索引复选框列是最右边的列）的复选框。这是为什么？
为什么复选框列必须在最左边？

But now I cannot find the CheckBoxes using the code above anymore (Changing the cell index from 1 to 0 now that the CheckBox column is the rightmost column). Why is that? Why do the CheckBox column have to be on the far left?

感谢很多提前

推荐答案

我没有一个答案，但我有相同的问题。我会希望索伦将回复，如果他最终找到了答案。如果不是我希望别人会用一个解决方案或替代方法作出回应。

I don't have an answer but I have the exact same problem. I'll hoping Soren will reply if he eventually found an answer. If not I'm hoping someone else will respond with a solution or a workaround.

问候，

鲍勃阿瓦洛

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