c# - Gridview 中的索引超出范围错误

Question

我在我的 Gridview 中添加了所有行 CheckBox 以帮助解决此问题 article .

这是我的计算按钮代码；

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，会出现这样的奇怪错误；

我该如何解决这个问题？

最好的问候，桑纳

Answer 1

确保您在 GridView 定义中定义了 DataKeys

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

   </asp:gridview>

也尝试像这样为 DataRow 添加检查

    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));
        }
      }
    }