Question

我在CheckBox帮助article中添加了所有行Gridview。

这是我的Calculate Button代码;

protected void Calculate_Click(object sender, EventArgs e)
    {
        bool atLeastOneRowDeleted = false; 

        foreach (GridViewRow row in GridView1.Rows) 
        { 
            CheckBox cb = (CheckBox)row.FindControl("ProductSelector"); 
            if (cb != null && cb.Checked)
            { 
                atLeastOneRowDeleted = true; 
                int productID = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Value); 
                Response.Write(string.Format( "This would have deleted ProductID {0}<br />", productID));
            }
        }

    }

但是当我这样做时，会发生这样的奇怪错误;

enter image description here

我该如何解决这个问题？

最诚挚的问候，Soner

Answer 1

确保在GridView定义中定义了DataKeys

  <asp:gridview id="GridView2" 
        datakeynames="productID"
        ...
        ...>
    enter code here

   </asp:gridview>

还可以尝试像这样添加DataRow检查

    foreach (GridViewRow row in GridView1.Rows) 
    {
      if(row.RowType == DataControlRowType.DataRow)
      { 
        CheckBox cb = (CheckBox)row.FindControl("ProductSelector"); 
        if (cb != null && cb.Checked)
        { 
            atLeastOneRowDeleted = true; 
            int productID = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Value); 
            Response.Write(string.Format( "This would have deleted ProductID {0}<br />", productID));
        }
      }
    }

Answer 2

它可能与您填充gridview的方式有关，或者您设置GridView存储DataKeys的方式，您是否可以发布两个代码，在.aspx页面上设置GridView组件（html代码）你填充它的地方？

编辑：

我试过你的例子，唯一不同的是我从DataSource控件的List intead中获取数据源，在这里运行得很好，我按Ctrl + c / Ctrl + v你的代码，所以看一看;

公共类MyClass { public int productId {get;组; } public string MUS_K_ISIM {get;组; } }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            List<MyClass> ChechkBoxDataSource = new List<MyClass>();
            ChechkBoxDataSource.Add(new MyClass() { productId = 1, MUS_K_ISIM = "Stack" });
            ChechkBoxDataSource.Add(new MyClass() { productId = 2, MUS_K_ISIM = "Overflow" });
            ChechkBoxDataSource.Add(new MyClass() { productId = 3, MUS_K_ISIM = "Example" });

            GridView1.DataSource = ChechkBoxDataSource;
            GridView1.DataBind();
        }
    }

    protected void Unnamed1_Click(object sender, EventArgs e)
    {
        foreach (GridViewRow row in GridView1.Rows)
        {
            if (row.RowType == DataControlRowType.DataRow)
            {
                CheckBox cb = (CheckBox)row.FindControl("ProductSelector");
                if (cb != null && cb.Checked)
                {
                    int productID = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Value);
                    Response.Write(string.Format("This would have deleted ProductID {0}<br />", productID));
                }
            }
        }
    }

Gridview中的索引超出范围错误

2 个答案: