“指定的参数超出了有效值的范围"

素材狗 2022-01-01 10:56:43 文章分类：C#/.NET问题点击数：次

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quot;Specified argument was out of the range of valid valuesquot;(“指定的参数超出了有效值的范围)

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问题描述

我正在使用文本框在 ASP.Net GridView 控件中添加动态行.但是当我点击我的添加新行按钮时出现以下错误.

<块引用>

指定的参数超出了有效值的范围.参数名称:index

可能是什么错误?

我的.aspx文件中的代码


<asp:gridview id="Gridview1" runat="server" autogeneratecolumns="false" gridlines="None"宽度="100%" 高度="100%"><列><asp:TemplateField><项目模板><div class="divRow"><div class="divColumn"><div><asp:Label ID="lbl1" runat="server" Text="Type Name" CssClass="formLable"></asp:Label><div><asp:TextBox ID="txt_type" Width="200" runat="server" CssClass="txtbox"></asp:TextBox>
<跨度><asp:RequiredFieldValidator ID="TYPE_NAME_VAL" runat="server" ControlToValidate="txt_type"ErrorMessage="需要类型."Display="Dynamic" CssClass="error"></asp:RequiredFieldValidator></span>
<div class="divColumn"><div><asp:Label ID="lbl2" runat="server" Text="Total" CssClass="formLable"></asp:Label>
<div><asp:TextBox ID="txt_total" Width="200" runat="server" CssClass="txtbox"></asp:TextBox>
<div class="divRow"><div class="divColumn"><div><asp:Label ID="lbl3" runat="server" Text="Max" CssClass="formLable"></asp:Label>
<div><asp:TextBox ID="txt_max" Width="200" runat="server" CssClass="txtbox"></asp:TextBox>
<div class="divColumn"><div><asp:Label ID="lbl4" runat="server" Text="Min" CssClass="formLable"></asp:Label>
<div><asp:TextBox ID="txt_min" Width="200" runat="server" CssClass="txtbox"></asp:TextBox>
<div class="divColumn"><div><asp:Label ID="lbl5" runat="server" Text="Rate" CssClass="formLable"></asp:Label>
<div><asp:TextBox ID="txt_rate" Width="200" runat="server" CssClass="txtbox"></asp:TextBox>
<asp:Button ID="ButtonAdd" runat="server" Text="添加新行" OnClick="ButtonAdd_Click"CausesValidation="False"/></ItemTemplate></asp:TemplateField></列></asp:gridview>

ButtonAdd_Click()的C#代码

if (ViewState["CurrentTable"] != null){DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];DataRow drCurrentRow = null;如果(dtCurrentTable.Rows.Count > 0){for (int i = 1; i <= dtCurrentTable.Rows.Count; i++){//提取文本框值TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("txt_type");TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("txt_total");TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("txt_max");TextBox box4 = (TextBox)Gridview1.Rows[rowIndex].Cells[4].FindControl("txt_min");TextBox box5 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("txt_rate");drCurrentRow = dtCurrentTable.NewRow();dtCurrentTable.Rows[i - 1]["Column1"] = box1.Text;dtCurrentTable.Rows[i - 1]["Column2"] = box2.Text;dtCurrentTable.Rows[i - 1]["Column3"] = box3.Text;dtCurrentTable.Rows[i - 1]["Column4"] = box4.Text;dtCurrentTable.Rows[i - 1]["Column5"] = box5.Text;行索引++；}dtCurrentTable.Rows.Add(drCurrentRow);ViewState["CurrentTable"] = dtCurrentTable;Gridview1.DataSource = dtCurrentTable;Gridview1.DataBind();}}别的{Response.Write("ViewState 为空");}

解决方案

您似乎试图从包含 5 个项目的集合中获取 5 个项目.查看您的代码，您似乎从位置 1 处的集合中的第二个值开始.集合是从零开始的，因此您应该从索引 0 处的项目开始.试试这个:

TextBox box1 = (TextBox)Gridview1.Rows[i].Cells[0].FindControl("txt_type");TextBox box2 = (TextBox)Gridview1.Rows[i].Cells[1].FindControl("txt_total");TextBox box3 = (TextBox)Gridview1.Rows[i].Cells[2].FindControl("txt_max");TextBox box4 = (TextBox)Gridview1.Rows[i].Cells[3].FindControl("txt_min");TextBox box5 = (TextBox)Gridview1.Rows[i].Cells[4].FindControl("txt_rate");

I'm adding dynamic Rows in ASP.Net GridView Control with TextBoxes. But I'm getting the error below when I click on my Add New Row button.

Specified argument was out of the range of valid values. Parameter name: index

What could be the error ?

Th code in my .aspx file

<div id="Div1" class="divTable">
    <asp:gridview id="Gridview1" runat="server" autogeneratecolumns="false" gridlines="None"
        width="100%" height="100%">
            <Columns>
                <asp:TemplateField>
                    <ItemTemplate>
                        <div class="divRow">
                            <div class="divColumn">
                                <div>
                                    <asp:Label ID="lbl1" runat="server" Text="Type Name" CssClass="formLable"></asp:Label>
                                </div>
                                <div>
                                    <asp:TextBox ID="txt_type" Width="200" runat="server" CssClass="txtbox"></asp:TextBox>
                                </div>
                                <span>
                                    <asp:RequiredFieldValidator ID="TYPE_NAME_VAL" runat="server" ControlToValidate="txt_type"
                                        ErrorMessage="Type is required." Display="Dynamic" CssClass="error"></asp:RequiredFieldValidator>
                                </span>
                            </div>
                            <div class="divColumn">
                                <div>
                                    <asp:Label ID="lbl2" runat="server" Text="Total" CssClass="formLable"></asp:Label>
                                </div>
                                <div>
                                    <asp:TextBox ID="txt_total" Width="200" runat="server" CssClass="txtbox"></asp:TextBox>
                                </div>
                            </div>
                        </div>
                        <div class="divRow">
                            <div class="divColumn">
                                <div>
                                    <asp:Label ID="lbl3" runat="server" Text="Max" CssClass="formLable"></asp:Label>
                                </div>
                                <div>
                                    <asp:TextBox ID="txt_max" Width="200" runat="server" CssClass="txtbox"></asp:TextBox>
                                </div>
                            </div>
                            <div class="divColumn">
                                <div>
                                    <asp:Label ID="lbl4" runat="server" Text="Min" CssClass="formLable"></asp:Label>
                                </div>
                                <div>
                                    <asp:TextBox ID="txt_min" Width="200" runat="server" CssClass="txtbox"></asp:TextBox>
                                </div>
                            </div>
                            <div class="divColumn">
                                <div>
                                    <asp:Label ID="lbl5" runat="server" Text="Rate" CssClass="formLable"></asp:Label>
                                </div>
                                <div>
                                    <asp:TextBox ID="txt_rate" Width="200" runat="server" CssClass="txtbox"></asp:TextBox>
                                </div>
                            </div>
                        </div>
                        <asp:Button ID="ButtonAdd" runat="server" Text="Add New Row" OnClick="ButtonAdd_Click"
                            CausesValidation="False" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:gridview>
</div>

C# code of ButtonAdd_Click()

if (ViewState["CurrentTable"] != null)
{
    DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
    DataRow drCurrentRow = null;
    if (dtCurrentTable.Rows.Count > 0)
    {
        for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
        {
            //extract the TextBox values
            TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("txt_type");
            TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("txt_total");
            TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("txt_max");
            TextBox box4 = (TextBox)Gridview1.Rows[rowIndex].Cells[4].FindControl("txt_min");
            TextBox box5 = (TextBox)Gridview1.Rows[rowIndex].Cells[5].FindControl("txt_rate");

            drCurrentRow = dtCurrentTable.NewRow();

            dtCurrentTable.Rows[i - 1]["Column1"] = box1.Text;
            dtCurrentTable.Rows[i - 1]["Column2"] = box2.Text;
            dtCurrentTable.Rows[i - 1]["Column3"] = box3.Text;
            dtCurrentTable.Rows[i - 1]["Column4"] = box4.Text;
            dtCurrentTable.Rows[i - 1]["Column5"] = box5.Text;

            rowIndex++;
        }
        dtCurrentTable.Rows.Add(drCurrentRow);
        ViewState["CurrentTable"] = dtCurrentTable;

        Gridview1.DataSource = dtCurrentTable;
        Gridview1.DataBind();
    }
}
else
{
    Response.Write("ViewState is null");
}

解决方案

It seems that you are trying to get 5 items out of a collection with 5 items. Looking at your code, it seems you're starting at the second value in your collection at position 1. Collections are zero-based, so you should start with the item at index 0. Try this:

TextBox box1 = (TextBox)Gridview1.Rows[i].Cells[0].FindControl("txt_type");
TextBox box2 = (TextBox)Gridview1.Rows[i].Cells[1].FindControl("txt_total");
TextBox box3 = (TextBox)Gridview1.Rows[i].Cells[2].FindControl("txt_max");
TextBox box4 = (TextBox)Gridview1.Rows[i].Cells[3].FindControl("txt_min");
TextBox box5 = (TextBox)Gridview1.Rows[i].Cells[4].FindControl("txt_rate");

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