在 asp.net c# 中单击按钮时无法获取 gridview 内文本框的值

Question

我有一个网格视图，我想在其中的文本框中写一些备注

Gridview

。所以我写了下面的代码。

protected void btnRejectSite_Click(object sender, EventArgs e)
{
    string strRemarks = string.Empty; string strID = string.Empty; string strCurrentUser = string.Empty;
    foreach (GridViewRow row in rptHotoIPDataInfo.Rows)
    {
        if (row.RowType == DataControlRowType.DataRow)
        {
            CheckBox chkRow = (row.Cells[0].FindControl("chkRow") as CheckBox);
            strID = (row.Cells[1].FindControl("lbl_ID") as Label).Text;

            TextBox txtRemarks = (TextBox)row.FindControl("txtRemarks");
            strRemarks = txtRemarks.Text; // here i want the text

            strCurrentUser = CurrentUserName;
            int intGroupID = CurrentUserGroupID;

        }
    }
}

但是当我调试

txtRemarks.Text

时，我总是获得

null

那样的价值。

下面是Gridview aspx代码。

<asp:GridView ID="rptHotoIPDataInfo" runat="server" AutoGenerateColumns="false" CssClass="appRejTableOuter appRejTable" Visible="true"
                                AllowPaging="true" PageSize="20" OnPageIndexChanging="rptHotoIPDataInfo_PageIndexChanging"
                                DataKeyNames="SAP_ID" OnRowEditing="rptHotoIPDataInfo_RowEditing" OnRowUpdating="rptHotoIPDataInfo_RowUpdating"
                                OnRowCancelingEdit="rptHotoIPDataInfo_RowCancelingEdit" OnRowDataBound="rptHotoIPDataInfo_RowDataBound"
                                OnRowCommand="rptHotoIPDataInfo_RowCommand" EnableViewState="true">

                                <Columns>
                                    <asp:TemplateField HeaderStyle-CssClass="appRejTable">
                                        <ItemTemplate>
                                            <asp:CheckBox ID="chkRow" runat="server" Checked="false" AutoPostBack="true" CssClass="appRejCheckbox" />
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                    <asp:TemplateField HeaderText="ID" ItemStyle-Width="50px" Visible="false">
                                        <ItemTemplate>
                                            <asp:Label ID="lbl_ID" runat="server" Text='<%#Eval("ID") %>'></asp:Label>
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                    <asp:TemplateField HeaderText="Rejected Remarks" HeaderStyle-CssClass="appRejTable">
                                        <ItemTemplate>
                                            <asp:TextBox ID="txtRemarks" Text='<%# Eval("REJECT_REMARKS") %>' runat="server" CssClass="appRejInput"></asp:TextBox>
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                    <asp:BoundField DataField="SAP_ID" HeaderText="SAP ID"></asp:BoundField>
                                    <asp:BoundField DataField="CHANGEREQUEST_ID" HeaderText="Change Request Number"></asp:BoundField>
                                    <asp:BoundField DataField="R4GSTATE_CODE" HeaderText="State Code"></asp:BoundField>
                                    <asp:BoundField DataField="HOTO_STATUS" HeaderText="Hoto Status"></asp:BoundField>
                                    <asp:BoundField DataField="CR_Justifications" HeaderText="CR Justifications"></asp:BoundField>
                                    <asp:BoundField DataField="APPROVE_REJECT" HeaderText="Status"></asp:BoundField>
                                    <asp:BoundField DataField="REJECTED_BY" HeaderText="Last Updated by"></asp:BoundField>
                                </Columns>
                            </asp:GridView>

请提出这里有什么问题

Answer 1

这是代码的修订版本，它使用层次结构在

TextBox

中查找

GridView

：

protected void btnRejectSite_Click(object sender, EventArgs e)
{
    string strRemarks = string.Empty; 
    string strID = string.Empty; 
    string strCurrentUser = string.Empty;

    foreach (GridViewRow row in rptHotoIPDataInfo.Rows)
    {
        if (row.RowType == DataControlRowType.DataRow)
        {
            CheckBox chkRow = (row.Cells[0].FindControl("chkRow") as CheckBox);
            strID = (row.Cells[1].FindControl("lbl_ID") as Label).Text;

            TextBox txtRemarks = (TextBox)row.FindControl("txtRemarks");
            if (txtRemarks != null)
            {
                strRemarks = txtRemarks.Text;
                // Your other logic here
            }

            strCurrentUser = CurrentUserName;
            int intGroupID = CurrentUserGroupID;
        }
    }
}

确保

btnRejectSite_Click

方法正确连接到标记或代码隐藏中按钮的单击事件。如果问题仍然存在，您可能需要检查是否有任何可能干扰正常回发行为的客户端 JavaScript。