如何在网格视图行编辑模式下查找文本框
本文关键字：模式 查找 文本 编辑 网格 视图 | 更新日期: 2023-09-27 18:33:34
我已经为此尝试了几个所谓的答案，它让我迷失了。我只是尝试使用今天的日期和时间默认一个TextBox Text值，但是当我使用CommandName"Edit"单击LinkButton时，我找不到该控件。
这是我的网格视图...
<asp:GridView ID="gvSignInRegister" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" CellPadding="3"
DataSourceID="sdsSignInRegister" ForeColor="Black" BackColor="White" BorderColor="#999999" BorderStyle="Solid" BorderWidth="1px" GridLines="Vertical" OnRowCommand="gvSignInRegister_RowCommand1">
<Columns>
<asp:TemplateField HeaderText="Returned" SortExpression="DateTimeReturned">
<EditItemTemplate>
<asp:TextBox ID="txtReturned" runat="server"></asp:TextBox>
<asp:ImageButton runat="Server" ID="calImg" ImageUrl="~/images/Calendar_scheduleHS.png" AlternateText="Click to show calendar" CausesValidation="False" />
<asp:RequiredFieldValidator ID="rfv1" runat="server" SetFocusOnError="true" ValidationGroup="vg1" ControlToValidate="txtReturned" ErrorMessage="Required"></asp:RequiredFieldValidator>
<ajaxToolkit:CalendarExtender ID="ce1" runat="server" PopupButtonID="calImg" Enabled="true" Format="dd/MM/yyyy" TargetControlID="txtReturned" PopupPosition="TopRight" OnClientDateSelectionChanged="AppendTime"></ajaxToolkit:CalendarExtender>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label9" runat="server" Text='<%# Eval("DateTimeReturned","{0:dd/MM/yyyy HH:mm}") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ShowHeader="False">
<EditItemTemplate>
<asp:Button ID="btnCAN" runat="server" CausesValidation="false" CommandName="Cancel" Text="CANCEL" />
<asp:Button ID="btnUPD" runat="server" ValidationGroup="vg1" CausesValidation="true" CommandName="Update" Text="UPDATE" />
</EditItemTemplate>
<ItemTemplate>
<asp:Button ID="btnEDT" runat="server" CausesValidation="false" CommandName="Edit" CommandArgument='<%# Container.DataItemIndex %>' Text="SIGN IN" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#CCCCCC" />
<PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#000099" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="Black" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="#CCCCCC" />
</asp:GridView>
链接按钮 btnEDT 工作并将网格视图置于编辑模式。但是在代码后面我找不到"txtReturn"。
这是我到目前为止尝试过的...
protected void gvSignInRegister_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Edit")
{
int rowIdx = Convert.ToInt32(e.CommandArgument);
GridViewRow row = gvSignInRegister.Rows[rowIdx];
if (row != null && row.RowType == DataControlRowType.DataRow)
{
TextBox tb = (TextBox)row.FindControl("txtReturned");
if (tb != null) tb.Text = DateTime.Now.ToString("dd/MM/yyyy HH:mm");
//I've tried this too but it does not work. Interestingly, it does not crash, so cells[4] must exist!
//row.Cells[4].Text = DateTime.Now.ToString("dd/MM/yyyy HH:mm");
}
}
}
由于某种原因，rowIdx 始终为 0。为什么？我认为行索引为 0 表示网格视图控件的标题。
我也尝试使用大多数其他人在其他帖子中建议的命名容器，但这返回了一个空白(我怀疑是新的？网格视图行。
即
GridViewRowrow = (GridViewRow(((GridViewRow((e.CommandSource(.命名容器(;
更新
我找到了这个，这正是我遇到的问题，但是通过 RowEdit 的解决方案仍然找不到文本框！
然而，RowDataBound((解决了它！在下面阅读我的答案。
答案是进入 GridView 本身的编辑模式版本，然后找到控件！
根据这篇文章...
<asp:GridView ID="gvSignInRegister" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" CellPadding="3"
DataSourceID="sdsSignInRegister" ForeColor="Black" BackColor="White" BorderColor="#999999" BorderStyle="Solid" BorderWidth="1px" GridLines="Vertical" OnRowDataBound="gvSignInRegister_RowDataBound">
<Columns> ...etc...
protected void gvSignInRegister_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
if ((e.Row.RowState & DataControlRowState.Edit) > 0)
{
TextBox tb = (TextBox)e.Row.FindControl("txtReturned");
if (tb != null) tb.Text = DateTime.Now.ToString("dd/MM/yyyy HH:mm");
}
}
}
使用 Container.DisplayIndex 而不是 Container.DataItemIndex
但是我认为如果您将其放置在EditItemTemplate中，则不会获得文本框控件
如果您期望编辑操作，请使用以下代码
.HTML
<asp:GridView ID="gvSignInRegister" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" CellPadding="3" ForeColor="Black" BackColor="White" BorderColor="#999999" BorderStyle="Solid" BorderWidth="1px" OnRowEditing="gvSignInRegister_RowEditing" OnRowCancelingEdit="gvSignInRegister_RowCancelingEdit" OnRowUpdating ="gvSignInRegister_RowUpdating" GridLines="Vertical">
<Columns>
<asp:TemplateField HeaderText="Returned" SortExpression="DateTimeReturned">
<EditItemTemplate>
<asp:TextBox ID="txtReturned" Text='<%#Bind("DateTimeReturned", "{0:dd/MM/yyyy HH:mm}")%>' runat="server"></asp:TextBox>
<asp:ImageButton runat="Server" ID="calImg" ImageUrl="~/images/Calendar_scheduleHS.png" AlternateText="Click to show calendar" CausesValidation="False" />
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label9" runat="server" Text='<%# Eval( "DateTimeReturned","{0:dd/MM/yyyy HH:mm}") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowEditButton="true" />
</Columns>
<FooterStyle BackColor="#CCCCCC" />
<PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#000099" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="Black" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="#CCCCCC" />
</asp:GridView>
代码隐藏：
protected void gvSignInRegister_RowEditing(object sender, GridViewEditEventArgs e)
{
gvSignInRegister.EditIndex = e.NewEditIndex;
List<QuotationDetail> itemList = (List<QuotationDetail>)ViewState["ItemList"];
gvSignInRegister.DataSource = itemList;
gvSignInRegister.DataBind();
}
protected void gvSignInRegister_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
}
protected void gvSignInRegister_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
var txtQty = (TextBox)gvSignInRegister.Rows[e.RowIndex].FindControl("txtQuantity");
decimal qty = 0;
decimal.TryParse(txtQty.Text, out qty);
if (qty < 0)
{
lblErrorSummary.InnerText = "Please provide valid Quantity";
lblErrorSummary.Visible = true;
return;
}
itemList[e.RowIndex].Quantity = qty
ViewState["ItemList"] = itemList;
gvSignInRegister.EditIndex = -1;
gvSignInRegister.DataSource = itemList;
gvSignInRegister.DataBind();
}