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Select items in a list box

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User41291981 posted

Hello,

I'm looking to select items in a list box based on the contents of a string. Lets say I have "comp1, comp2, comp3, comp4" stored in StringBuilder "company". I would like to loop through company and select all of the companies if they exist in a list box.

Is this possible? I'm VERY new to programming in general so go easy on me :)

Thanks,

Jon

Wednesday, June 22, 2016 5:13 PM

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User177399542 posted

Based on your requirements I have created a sample for you please check:

<asp:ListBox runat="server" ID="lstBxCompany" SelectionMode="Multiple" Width="500" Height="200">
        <asp:ListItem Text="comp1" Value="comp1" />
        <asp:ListItem Text="Demo1" Value="Demo1" />
        <asp:ListItem Text="comp2" Value="comp2" />
        <asp:ListItem Text="comp3" Value="comp3" />
        <asp:ListItem Text="Demo2" Value="Demo2" />
        <asp:ListItem Text="comp4" Value="comp4" />
        <asp:ListItem Text="Demo3" Value="Demo3" />
    </asp:ListBox>
    <asp:Button Text="Check Values" ID="btnCheckValues" OnClick="btnCheckValues_Click" runat="server" />

Code Behind:

 protected void btnCheckValues_Click(object sender, EventArgs e)
    {
        StringBuilder company = new StringBuilder("comp1, comp2, comp3, comp4");
        //--- Here we will split string values and store in array.
        string[] comp = company.ToString().Split(',');

        //---- Loop through each item stored in array.
        foreach (var c in comp)
        {
            //--- Loop through each item stored in Listbox
            foreach (ListItem li in lstBxCompany.Items)
            {
                if (li.Text == c.Trim())//--- Here Trim() method is used to remove unwanted blank space.
                {
                    li.Selected = true;
                }
            }
        }

    }

Marked as answer by Anonymous Thursday, October 7, 2021 12:00 AM

Thursday, June 23, 2016 5:16 AM

Answered by:

Select items in a list box

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