CODEWITHSUNDEEP
c#asp.netdrop-down-menu
Mindan
Mindan

Reputation: 1019

Asp .NET Making a value Check on a drop down list from a nother drop down list

I want to force the user to change the selection of the first drop down list IF he/she selected a particular value in the second drop down list.

<asp:DropDownList ID="ddlGxP" runat="server" CssClass="stdDropdownSmall" OnSelectedIndexChanged="ddlGxP_SelectedIndexChanged" AutoPostBack="true" />

< else { } The above is the first drop down list where the user should select value from "ddlGxP"

The following is the second drop down list where I need to make the check when the user make a selection, I have to check on the first drop down.

<div class="divStandard">
    <asp:Label ID="Label23" runat="server" CssClass="stdLabel">nalized Method <span class="mandatory"> *</span></asp:Label>

    <asp:DropDownList ID="ddlFinalizedMethod" runat="server" CssClass="stdDropdown" />
    <asp:CustomValidator ID="cvFinalizedMethod" runat="server" ControlToValidate="ddlFinalizedMethod" InitialValue="0" OnServerValidate="cvFinalizedMethod_ServerValidate"
        CssClass="RequiredFieldError" ErrorMessage=" ! Please select another GxP Standard"  />
    } else {
    <asp:TextBox ID="txtFinalizedMethodDisabled" runat="server" CssClass="stdTextboxSmallDisabled" Enabled="false" />
    } 

</div>

Upvotes: 0

Views: 91

Answers (1)

Bernardo
Bernardo

Reputation: 36

i don't have enough reputation so here is my comment.

i just want to clarify the problem in basic terms. your design view consists of two dropdownlists. you make a selection on dropdownlist1, its selectedindexchanged is triggered performing some sort of action.

you now make a selection on dropdownlist2, its selectedindexchanged is triggered and performs some sort of manipulation on dropdownlist1, either changing its contents or selected value;

SORRY FOR THE WAIT, I MADE SOME SIMPLE ERRORS DUE TO FORGETTING SOME THINGS;

The ANSWER!!!!

<body>
<form id="form1" runat="server">
<div>
    <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label></div>
<div>
    <asp:DropDownList ID="DropDownList1" runat="server">
    </asp:DropDownList>
    <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="True" 
        onselectedindexchanged="ddl2_selectindexchange">
    </asp:DropDownList>
</div>
</form>
</body>


protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        List<string> str = new List<string>();
        str.Add("red");
        str.Add("blue");
        str.Add("black");

        List<string> str2 = new List<string>();
        str2.Add("red");
        str2.Add("blue");
        str2.Add("black");

        DropDownList1.DataSource = null;
        DropDownList1.DataSource = str;
        DropDownList1.DataBind();
        DropDownList2.DataSource = null;
        DropDownList2.DataSource = str2;
        DropDownList2.DataBind();

    }
}

protected void ddl2_selectindexchange(object sender, EventArgs e)
{
    DropDownList ddl = new DropDownList();
    ddl = sender as DropDownList;

    ListItem li = new ListItem();
    li = ddl.SelectedItem;
    string s = li.Text;
    Label1.Text = s;
}

Upvotes: 1

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