从一个GridView单元格中获得价值 [英] Getting value from a Gridview cell

问题描述

我想从一个GridView一个int值。这里是我的GridView的截图。

I'm trying to get an int value from a GridView. Here is the screenshot of my gridview.

下面是ASP code为GridView
    
                
                    
                
            

Here is the asp code for the Gridview

我已经创建了哪里，当我preSS的GridView中删除按钮是想给我第二列的int值一RowCommand方法。因此，例如，如果我是preSS最后一个删除按钮它会给我的5 int值

I have created a RowCommand method where when I press the Remove button on the GridView it is suppose to give me the int value of the 2nd column. So for example if I was to press the last Remove button it would give me an int value of 5.

这是对我的方法codebehind

This is my codebehind for the method

protected void grdOrder_RowCommand(object sender, GridViewCommandEventArgs e)
{
    if (e.CommandName == "Remove")
    {

        int bigStore = Convert.ToInt32(grdOrder.SelectedRow.Cells[2].Text);

        clsStockCollection AnId = new clsStockCollection();

        clsStock TheOrder = new clsStock();
        TheOrder.OrderId = bigStore;
        AnId.DeleteOrder(TheOrder);
        DataCall();

    }
}

当我运行这个code我得到这个错误。
    对象引用未设置到对象的实例。

When I run this code I get this error. Object reference not set to an instance of an object.

我不明白为什么我需要引用，例如一个对象：对象作为新对象。我为什么要这么做？

I don't understand how or why I need to reference an object for example : Object As New Object. Why do I need to do this?

下面是完整的类codebehind：pastebin.com/yzLR7s2w

Here is the codebehind for the full class : pastebin.com/yzLR7s2w

提前感谢

推荐答案

SelectedRows 只返回被选中的行;没有选择，你不会得到任何东西。取而代之的 INT BIGSTORE = Convert.ToInt32（grdOrder.SelectedRow.Cells [2]。文本）; 尝试：

SelectedRows only returns rows that have been selected; without a selection you won't get anything. Instead of int bigStore = Convert.ToInt32(grdOrder.SelectedRow.Cells[2].Text); try:

int rowIndex = Convert.ToInt32(e.CommandArgument); // Get the current row
int bigStore = Convert.ToInt32(grdOrder.Rows[rowIndex].Cells[2].Text);

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