指数超出范围 [英] Index is out of range

问题描述

在gridviewID''gvtest''中我收到一条错误，说明：

''索引超出范围。必须是非负的且小于集合的大小''

我提交我使用的代码。

In a gridviewID ''gvtest'' I get an error stating as :
''Index is out of range. Must be non-negative and less than the size of collection''
I submit the codes I have used.

<asp:GridView ID="gvtest1" runat="server" AutoGenerateColumns="False"

            style="z-index: 1; left: 68px; top: 60px; position: absolute; height: 105px; width: 390px; background-color: #ECE9D8;"

           DataSourceID="SqlDataSource1"

            HorizontalAlign="Center" BorderColor="Maroon" ForeColor="#CC9900">
         <Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chkSelect" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>

protected void btnProcess_Click(object sender, EventArgs e)
  {

      string str = string.Empty;
      string strname = string.Empty;
      string v_amt = string.Empty;

      foreach (GridViewRow gvrow in gvtest1.Rows)
      {
          CheckBox chk = (CheckBox)gvrow.FindControl("chkSelect");
          if (chk != null & chk.Checked)
          {
              //str += gvtest.Rows[gvrow.RowIndex].Value.ToString() + ',';
              str += gvtest1.DataKeys[gvrow.RowIndex].Value.ToString() + ',';
              strname += gvrow.Cells[2].Text + ',';
              v_amt += gvrow.Cells[5].Text + ',';
              string v_stringamt = gvrow.Cells[5].Text;
              int v_amt1 = Convert.ToInt32(v_stringamt);

              v_totamt = (v_totamt + v_amt1);
          }
      }

任何人都可以帮帮我吗？

Can anyone help me out?

推荐答案

它只是意味着您正在尝试访问不存在的索引。



例如：

您定义一个包含10个元素的数组A.当您尝试访问A [15]时，您将获得索引超出范围错误。由于您定义了10个元素，因此有效值仅为0到9。



现在，使用Visual Studio调试并查看获取它的时间和位置。在那里纠正你的逻辑。

It simply means that you are trying to access an index that does not exists.

For example:
You define an array A of 10 elements. When you try to access A[15] you will get an index out of range error. Since you defined 10 elements, valid values are from 0 to 9 only.

Now, use Visual Studio debug and see when & where you get it. Correct your logic there.

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