Question

aspx代码

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Button ID="TestButton" runat="server" OnClick="TestButton_Click"
            Text="AddNewRow" />
    </div>
    <div>
        <asp:GridView ID="MyGrid" runat="server" GridLines="Both"
            AutoGenerateColumns="false" OnDataBound="MyGrid_DataBound"
            EnableViewState="true">
            <Columns>
                <asp:BoundField DataField="Name" HeaderText="name" />
                <asp:TemplateField HeaderText="CheckBox1">
                    <ItemTemplate>
                        <asp:CheckBox ID="CheckBox1" EnableViewState="true"
                           runat="server" AutoPostBack="true" />
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="CheckBox2">
                    <ItemTemplate>
                        <asp:CheckBox ID="CheckBox2" runat="server"
                           EnableViewState="true" AutoPostBack="true" />
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="CheckBox3">
                    <ItemTemplate>
                        <asp:CheckBox ID="CheckBox3" runat="server"
                           AutoPostBack="true" EnableViewState="true" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    </div>
    </form>
</body>
</html>

背后的代码

public DataTable Dt = new DataTable();
protected void Page_Load(object sender, EventArgs e) { }
protected void TestButton_Click(object sender, EventArgs e)
{
   DataRow dr = null;
   if(ViewState["T"]==null)
   {
      Dt.Columns.Add(new DataColumn("Name", typeof(string)));
      Dt.Columns.Add(new DataColumn("CheckBox1", typeof(bool)));
      Dt.Columns.Add(new DataColumn("CheckBox2", typeof(bool)));
      Dt.Columns.Add(new DataColumn("CheckBox3", typeof(bool)));
      ViewState["T"] = Dt;
    }
    Dt =(DataTable) ViewState["T"];
    dr = Dt.NewRow();
    dr["Name"] = "Sam";
    dr["CheckBox1"] = true;
    dr["CheckBox2"] = false;
    dr["CheckBox3"] = false;
    Dt.Rows.Add(dr);
    SearchGrid.DataSource = Dt;
    SearchGrid.DataBind();
 }
 protected void MyGrid_DataBound(object sender, EventArgs e)
 {
    (SearchGrid.Rows[SearchGrid.Rows.Count - 1].Cells[1].FindControl("CheckBox1")
                as CheckBox).Checked = true;
  }
}

当我点击Addnew行按钮时，结果会像这样

enter image description here

但是当我再次点击时

enter image description here

第一行复选框取消选中。我为每个复选框启用了视图状态但它仍然不起作用。我应该对我绑定的数据表做些什么？

Answer 1

你的ViewState非常好。它必须存储您想要保留的数据。

您尚未将gridView列绑定到任何字段，在本例中是DataTable的DataColumn名称。将您的复选框绑定如下：

<asp:CheckBox ID="CheckBoxX" runat="sever" 
           Checked ='<%# Eval("DataFieldName") %>' />

即。

<asp:CheckBox ID="CheckBox1" runat="server" Checked='<%# Eval("CheckBox1") %>' 
      AutoPostBack="true" EnableViewState="true" />

<asp:CheckBox ID="CheckBox2" runat="server" Checked='<%# Eval("CheckBox2") %>' 
  AutoPostBack="true" EnableViewState="true" />

<asp:CheckBox ID="CheckBox3" runat="server" Checked='<%# Eval("CheckBox3") %>' 
  AutoPostBack="true" EnableViewState="true" />

因为CheckBox1，CheckBox2，CheckBox3是分配给DataSource

的SearchGrid(GridView)的字段（列）名称

在asp.net gridview中动态生成CheckBox不会保持状态

1 个答案: