C# 在 Gridview 中从 HiddenField 设置和检索值
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Set and retrieve value from HiddenField in Gridview
提问by deadEddie
I have a custom control that is embedded in a GridView. The control needs a value (Id column from SqlDataSource1) contained in the same data table that the gridview is bound to for its constructor.
我有一个嵌入在GridView. 该控件需要一个值（SqlDataSource1 中的Id 列），该值包含在gridview 为其构造函数绑定到的同一数据表中。
The problem I'm having is that I don't understand how to set the value of the hidden field. The data type is for this field is a Guid.
我遇到的问题是我不明白如何设置隐藏字段的值。此字段的数据类型是 Guid。
ASPX:
ASPX:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="GridUserControl.ascx.cs" Inherits="CustomNavi_V1_ControlTest.CustomControls.GridUserControl" %>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:srsfwa1_scrambledConnectionString %>" SelectCommand="SELECT [ApplicantId], [ValleyId], [SchoolId], [StatusId], [StudentID], [InterviewDate], [Id] FROM [tblSubmissions]"></asp:SqlDataSource>
<asp:GridView ID="StudentGridView" DataKeysNames="Submission" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" OnDataBound ="StudentGridView_OnDataBind">
<Columns>
<asp:BoundField DataField="ApplicantId" HeaderText="ApplicantId" SortExpression="ApplicantId" />
<asp:BoundField DataField="ValleyId" HeaderText="ValleyId" SortExpression="ValleyId" />
<asp:BoundField DataField="SchoolId" HeaderText="SchoolId" SortExpression="SchoolId" />
<asp:BoundField DataField="StudentID" HeaderText="StudentID" SortExpression="StudentID" />
<asp:BoundField DataField="InterviewDate" HeaderText="InterviewDate" SortExpression="InterviewDate" />
<asp:BoundField DataField="StatusId" HeaderText="StatusId" SortExpression="StatusId" visible="true"/>
<asp:BoundField DataField="Id" Visible ="false" />
<asp:TemplateField>
<ItemTemplate>
<asp:HiddenField ID="HiddenField" DataField="SubmissionID" runat="server" Value=""/>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField Visible="true" HeaderText="Ed's Fabulous Custom Control!!" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
HiddenField:
HiddenField：
protected void AddCustomControl()
{
int iterator = 0;
foreach (GridViewRow row in StudentGridView.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
//StudentGridView.HiddenField.value= StudentGridView.
//HiddenField hiddenField = this.StudentGridView1.FindControl("
Guid submissionIdGuid = (Guid)hiddenField.Value; // ("SubmissionID").Value;
string controlID = "NavigatorControlID" + iterator.ToString();
string submissionID = row.Cells[6].Text; // tblSubmissions Id field
string statusId = row.Cells[5].Text; // tblSubmissions StatusId field
connection = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["srsfwa1_scrambledConnectionString"].ToString());
CustomNavi_V1._1.CustomNavi_V1 navigator = new CustomNavi_V1._1.CustomNavi_V1(submissionID, statusId);
navigator.ID = controlID;
navigator.SubmissionID = submissionIdGuid;
navigator.BackButtonImage = "Images/back_button.png";
navigator.ForwardButtonImage = "Images/fwd_button.png";
row.Cells[7].Controls.Add(navigator);
iterator++;
}
}
}
采纳答案by afzalulh
To get the GUID from hidden field, It will be something like:
要从隐藏字段获取 GUID，它将类似于：
HiddenField hiddenField = (HiddenField)row.FindControl("HiddenField");
Guid submissionIdGuid = new Guid();
Guid.TryParse(hiddenField.Value, out submissionIdGuid );
And to set,
并设置，
hiddenField.Value = submissionIdGuid.ToString();
