Question

我有一个单选按钮列表，应该以Web表单的视图和编辑模式显示。当页面加载时，单选按钮应该根据从数据库中获取的值（类型为位的IsAnimal）选择值。

当用户切换到编辑模式时，单选按钮默认选择的值也应与查看模式相同。当用户切换时，编辑模式中所选的单选按钮值将会改变。但我在这里得到的是，在selectedindex_changed之后，pre_render将保持触发。如果我在prerender中执行if（！Page.IsPostBack），那么在编辑模式下默认选择值为null。

protected void Form_PreRender(object sender, EventArgs e) {
  RadioButtonList rbViewIsAnimal = (RadioButtonList) fvForm.FindControl("rbViewIsAnimal");
  RadioButtonList rbEditIsAnimal = (RadioButtonList) fvForm.FindControl("rbEditIsAnimal");

  if (txtIsAnimal.Value == "True") {
    if (rbViewIsAnimal != null) {
      rbViewIsAnimal.Items.FindByValue("1").Selected = true;
    }
    if (rbEditIsAnimal != null) {
      rbEditIsAnimal.Items.FindByValue("1").Selected = true;
    }
  } else {
    if (rbViewIsAnimal != null) {
      rbViewIsAnimal.Items.FindByValue("0").Selected = true;
    }
    if (rbEditIsAnimal != null) {
      rbEditIsAnimal.Items.FindByValue("0").Selected = true;
    }
  }
}


protected void rbEditIsAnimal_SelectedIndexChanged(object sender, EventArgs e) {
  RadioButtonList rbEditIsAnimal = (RadioButtonList) fvForm.FindControl("rbEditIsAnimal");
  TextBox txtEditAnimalDescription = (TextBox) fvForm.FindControl("txtEditAnimalDescription");

  if (txtIsAnimal.Value == "True") {
    txtEditAnimalDescription.Enabled = false;
    txtEditAnimalDescription.Text = string.Empty;
  } else {
    txtEditAnimalDescription.Enabled = true;
  }
}

<ItemTemplate>
  <asp:HiddenField runat="server" ID="txtIsAnimal" Value='<%# Bind("IsAnimal") %>' />
  <asp:RadioButtonList runat="server" ID="rbViewIsAnimal" Enabled="false">
    <asp:ListItem Text="Not Animal" Value="0" />
    <asp:ListItem Text="Animal" Value="1" />
  </asp:RadioButtonList>
</ItemTemplate>

<EditItemTemplate>
  <asp:HiddenField runat="server" ID="txtIsAnimal" />
  <asp:RadioButtonList runat="server" ID="rbEditIsAnimal" Value='<%# Bind("IsAnimal") %>' AutoPostBack="true">
    <asp:ListItem Text="Not Animal" Value="1" />
    <asp:ListItem Text="Animale" Value="0" />
  </asp:RadioButtonList>
</EditItemTemplate>

Answer 1

我找到了一个看起来像你需要的样本here。样本数据有四列，并且第三列和第四列中有一个radiobuttonlist和一个下拉列表，因此下面的代码使用数据行单元[2]和[3]。我添加了一些评论。

// i believe this fires on load *and* when editing.
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
  DataRowView dRowView = (DataRowView)e.Row.DataItem;
  if (e.Row.RowType == DataControlRowType.DataRow)
  {
    // editing:
    if ((e.Row.RowState & DataControlRowState.Edit) > 0)
    {
      // find the controls.
      RadioButtonList rblGender = (RadioButtonList)e.Row.FindControl("rbGenderEdit");
      DropDownList ddlStatus = (DropDownList)e.Row.FindControl("ddlStatusEdit");
      // set the values.
      rblGender.SelectedValue = dRowView[2].ToString();
      ddlStatus.SelectedValue = dRowView[3].ToString();
    }
  }           
}

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
  // find the controls.
  RadioButtonList rblGender = (RadioButtonList)GridView1.Rows[e.RowIndex].FindControl("rbGenderEdit");
  DropDownList ddlStatus = (DropDownList)GridView1.Rows[e.RowIndex].FindControl("ddlStatusEdit");
  // set the values.
  SqlDataSource1.UpdateParameters["Sex"].DefaultValue = rblGender.SelectedValue;
  SqlDataSource1.UpdateParameters["MaritalStauts"].DefaultValue = ddlStatus.SelectedValue;
}

在视图和编辑模式下选择RadioButtonList

1 个答案: