CODEWITHSUNDEEP
html.net
user3405179
user3405179

Reputation: 184

Cannot convert type 'string' to 'bool' Error in conditional operation in TemplateField's ItemTemplate

I want to visible div if my condition is satisfied. I use various way but it's give me an error. "Cannot convert type 'string' to 'bool'" what should i do for it?

I am working with Gridview

It's give me build time error.

<asp:TemplateField HeaderText="Stock">
    <ItemTemplate>
        <div id="divfake" visible='<%# ((Convert.ToInt32(Eval("AlertQty")) < Convert.ToInt32(Eval("InHandStock"))) ? "true" : "False") %>' runat="server">
              <%# Eval("InHandStock")%>
        </div>
    </ItemTemplate> 
</asp:TemplateField>

Upvotes: 0

Views: 196

Answers (3)

CurseStacker
CurseStacker

Reputation: 1079

Place your values in HiddenFields and change your div into a Panel control.

        <asp:TemplateField>
            <ItemTemplate>
                <asp:HiddenField ID="hfAlertQty" runat="server" Value='<%# Eval("AlertQty") %>' />
                <asp:HiddenField ID="hfInHandStock" runat="server" Value='<%# Eval("InHandStock") %>' />
                <asp:Panel ID="divfake" runat="server">
                    <%# Eval("InHandStock")%>
                </asp:Panel>
            </ItemTemplate>
        </asp:TemplateField>

Then on your codebehind,

foreach(GridViewRow row in GridView1.Rows) //check condition for each row and set visibility of the Panel
{
    if(row.RowType == DataControlRowType.DataRow) //do the following for rows that only have the data
    {
        HiddenField hfAlert = (HiddenField)row.FindControl("hfAlertQty"); //looks for the value of alert in HiddenField
        HiddenField hfStock = (HiddenField)row.FindControl("hfInHandStock"); //looks for the value of stock in HiddenField

        Panel div = (Panel)row.FindControl("divFake"); //looks for the Panel to hide / show

        if(Convert.ToInt32(hfAlert.Value) < Convert.ToInt32(hfStock.Value)) //if alert is lesser than the stock hide, else show
        {
            div.Visible = false;
        }
        else
        {
            div.Visible = true;
        }

    }
}

Upvotes: 1

Ankush Jain
Ankush Jain

Reputation: 6999

try this

 <asp:TemplateField HeaderText="Stock">
        <ItemTemplate>
            <div id="divfake" visible='<%#GetDivVisibility(Eval("AlertQty"),Eval("InHandStock"))%>'>
            </div>
        </ItemTemplate> 
    </asp:TemplateField>

Just add this function, inside C# with public access level

  public bool GetDivVisibility(object alertQty, object inHandStock)
        {
            return Convert.ToInt32(alertQty) < Convert.ToInt32(inHandStock) ? true : false;
        }

Upvotes: 1

PM.
PM.

Reputation: 1721

Try:

<div id="divfake" visible='<%= ((Convert.ToInt32(Eval("AlertQty")) < 
Convert.ToInt32(Eval("InHandStock"))) ? "visible" : "hidden") %>' runat="server">

I guess that your Eval and Convert.ToInt32 are returning correct values.

Upvotes: 0

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