如果在gridview中选中复选框，则验证下拉列表 [英] validate dropdown if checkbox checked inside gridview

问题描述

 <   asp：GridView     ID   =  gvAttributes     runat   =  server  
   
                               AutoGenerateColumns   =  false    EnableModelValidation   =  True  
   
                              < span class =code-attribute> CssClass   =  GridViewStyle    onrowdatabound   =  gvAttributes_RowDataBound >  
 <  列 >  
 <   asp：TemplateField     HeaderText   = 选择 >  
 <   ItemTemplate  >  
 <   asp：CheckBox  < span class =code-attribute>   ID   =  cbxAttributescheck    runat   = 服务器   文本  =' '  
   
                  <％＃    Eval（AttributeName）   ％ >  AutoPostBack =trueOnCheckedChanged =cbxAttributescheck_CheckedChanged/> 
 <   asp：HiddenField     ID   =  hdnAttributeValue    runat   = 服务器   值  ='  '  
   
                  <％＃    Eval（AttributeID）   ％ > '/> 
 <   asp：标签    ID   =  lblDelete    runat   = 服务器   文字  ='  '  
   
                      <％＃    Eval （AttributeID）   ％ > 'Visible =false> <   / asp：Label  >  
 <   / ItemTemplate  >  
 <   / asp：TemplateField  >  
 <   asp： TemplateField     HeaderText   = 数据类型   >  
 <   ItemTemplate  >  
 <   asp：DropDownList     ID   =  ddlAttributesDataType    runat   = 服务器 >  
 <   / asp：DropDownList  >  
 < span class =code-keyword><   asp：RequiredFieldValidator     ID   =  rfvAttributeType    runat   =  server  
   
                    < span class =code-attribute>                          < span class =code-attribute>                             ErrorMessage   =  *     已启用  =  false  
   
                            < span class =code-attribute>                                               ControlToValidate   =  ddlAttributesDataType    InitialValue   =  0 >  
 <   / asp：RequiredFieldValidator  >  
 <   / ItemTemplate  > ;  
 <   / asp：TemplateField  >  
 <   asp：TemplateField     HeaderText   = 允许空值   >  
 <   ItemTemplate  >  
 <   asp：CheckBox     ID   =  cbxAttributesisnull    runat   =  server    /  >  
 <   / ItemTemplate  >  
 <   / asp：TemplateField  >  
 <   /列 >  
 <   / asp：GridView  >  

< pre lang =c＃> protected void cbxAttributescheck_CheckedChanged（ object sender，EventArgs e）
{
CheckBox cbx =（CheckBox）sender;
string CurrentCbxId =（（CheckBox）sender）.ClientID;
foreach （GridViewRow Row in gvAttributes.Rows）
{
if （（（CheckBox）Row.FindControl（ cbxAttributescheck ））。ClientID.Equals（CurrentCbxId）&& cbx.Checked）
{
RequiredFieldValidator rfvAttributeType =（RequiredFieldValidator）Row.FindControl（ rfvAttributeType）;
rfvAttributeType.Enabled = true ;
}
}
}

我按照上面的网格视图。

我想启用选中复选框时，必填字段验证器用于下拉列表。

我想通过JavaScript来做这个服务器端。

我试过但无法解决问题。我试图启用验证器，当选中复选框时，否则它将被禁用。

我需要帮助。

解决方案

验证器需要ValidationGroup属性才能使用一些值，分配一个验证组（比如' 'validate''）复选框，下拉列表以及要激活验证的按钮。试一试并发布您的结果。

<asp:GridView ID="gvAttributes" runat="server"

              AutoGenerateColumns="false" EnableModelValidation="True"

              CssClass="GridViewStyle" onrowdatabound="gvAttributes_RowDataBound">
  <Columns>
    <asp:TemplateField HeaderText="Select">
      <ItemTemplate>
        <asp:CheckBox ID="cbxAttributescheck" runat="server" Text=''

        <%# Eval("AttributeName") %> AutoPostBack="true" OnCheckedChanged="cbxAttributescheck_CheckedChanged"/>
        <asp:HiddenField ID="hdnAttributeValue" runat="server" Value=''

        <%# Eval("AttributeID") %>' />
        <asp:Label ID="lblDelete" runat="server" Text=''

          <%# Eval("AttributeID") %>'   Visible="false"></asp:Label>
      </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Data Type" >
      <ItemTemplate>
        <asp:DropDownList ID="ddlAttributesDataType" runat="server">
        </asp:DropDownList>
        <asp:RequiredFieldValidator ID="rfvAttributeType" runat="server"

                                    ErrorMessage="*"  Enabled="false"

                                    ControlToValidate="ddlAttributesDataType" InitialValue="0">
        </asp:RequiredFieldValidator>
      </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Allow Nulls" >
      <ItemTemplate>
        <asp:CheckBox ID="cbxAttributesisnull" runat="server" />
      </ItemTemplate>
    </asp:TemplateField>
  </Columns>
</asp:GridView>

protected void cbxAttributescheck_CheckedChanged(object sender, EventArgs e)
{
    CheckBox cbx = (CheckBox)sender;
    string CurrentCbxId = ((CheckBox)sender).ClientID;
    foreach (GridViewRow Row in gvAttributes.Rows)
    {
        if (((CheckBox)Row.FindControl("cbxAttributescheck")).ClientID.Equals(CurrentCbxId) && cbx.Checked)
        {
            RequiredFieldValidator rfvAttributeType = (RequiredFieldValidator)Row.FindControl("rfvAttributeType");
            rfvAttributeType.Enabled = true;
        }
    }
}

I took grid view as above.
I want to enable the required field validator for drop down, when check box is checked.
I want to do this server side not through JavaScript.
I tried but unable to work out. I tried to enable the validator, when check box checked else it will be disabled.
I need assistance on this.

解决方案

a validator needs ValidationGroup property to have some value to work, assign a Validation Group (say ''validate'') to check box, drop down and the button on which you want to fire validation. Give it a try and post your outcome.

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