set column width of a gridview in asp.net

I dragged and dropped a GridView from toolbox to Aspx page.the design code looks like this

<asp:GridView ID="gridview1" runat="server"   style="text-align:center;width: 1327px;" 
    CellPadding="4" ForeColor="#333333" GridLines="None" AllowPaging="True" 
    EnableSortingAndPagingCallbacks="True" PageSize="50" AutoGenerateEditButton="True">
    <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
    <EditRowStyle BackColor="#999999" />
    <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
    <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
    <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" 
        Height="12px" VerticalAlign="Bottom" Width="12px" Wrap="False" />
    <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
    <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
    <SortedAscendingCellStyle BackColor="#E9E7E2" />
    <SortedAscendingHeaderStyle BackColor="#506C8C" />
    <SortedDescendingCellStyle BackColor="#FFFDF8" />
    <SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>

I have a column by name Address in database.The table is bound to this grid view using following VB.NET code

 Dim ds as Data.DataSet
 Dim da As New OleDbDataAdapter("select col1,col2,col3,col4,col5,col6,col7,col8,col9,col10,Address from table, con)
        da.Fill(ds)
  开发者_运维知识库      gridviewrealestate.DataSource = ds
        gridviewrealestate.DataBind()

Now,When the gridview is displayed,the columns are very close to each other due to large information present in Address Column.I want to set the Address Column to a particular width. Please help me how to do this.

<asp:GridView ID="GridView1" runat="server">
    <HeaderStyle Width="10%" />
    <RowStyle Width="10%" />
    <FooterStyle Width="10%" />
    <Columns>
        <asp:BoundField HeaderText="Name" DataField="LastName" 
            HeaderStyle-Width="10%" ItemStyle-Width="10%"
            FooterStyle-Width="10%" />
    </Columns>
</asp:GridView>

I know this is an old Question, but it popped up when I was looking for a solution to the same issue, so I thought that I would post what worked for me.

<asp:BoundField DataField="Description" HeaderText="Bond Event" ItemStyle-Width="300px" />

I used the ItemStyle-Width attribute on my BoundField and it worked very nicely I haven't had any issues yet.

I didn't need to add anything else to the rest of the code to make this work either.

Set width

HeaderStyle-width

for Example HeaderStyle-width="10%"

This what worked for me. set HeaderStyle-Width="5%", in the footer set textbox width Width="15",also set the width of your gridview to 100%. following is the one of the column of my gridview.

    <asp:TemplateField   HeaderText = "sub" HeaderStyle-ForeColor="White" HeaderStyle-Width="5%">
<ItemTemplate>
    <asp:Label ID="sub" runat="server" Font-Size="small" Text='<%# Eval("sub")%>'></asp:Label>
</ItemTemplate> 
 <EditItemTemplate>
    <asp:TextBox ID="txt_sub" runat="server" Text='<%# Eval("sub")%>'></asp:TextBox>
</EditItemTemplate> 
<FooterTemplate>
    <asp:TextBox ID="txt_sub" runat="server" Width="15"></asp:TextBox>
</FooterTemplate>

You need to convert the column into a 'TemplateField'.

In Designer View, click the smart tag of the GridView, select-> 'Edit columns'. Select your column you wish to modify and press the hyperlink converting it to a template. See screenshot: Converting column to template.

Note: Modifying your datasource might regenerate the columns again, so it might make changes to your template columns.

Ref: https://msdn.microsoft.com/en-us/library/bb288032.aspx

Add HeaderStyle-Width and ItemStyle-width to TemplateFiels

 <asp:GridView ID="grdCanceled" runat="server" AutoGenerateColumns="false" OnPageIndexChanging="grdCanceled_PageIndexChanging"  AllowPaging="true" PageSize="15"
         CssClass="table table-condensed table-striped table-bordered" GridLines="None">
             <HeaderStyle BackColor="#00BCD4"  ForeColor="White" />
             <PagerStyle CssClass="pagination-ys" />
               <Columns>
            <asp:TemplateField HeaderText="Mobile NO" HeaderStyle-Width="10%" ItemStyle-Width="10%">
                <ItemTemplate>
                  <%#Eval("mobile") %>
                </ItemTemplate>
               </asp:TemplateField>
           <asp:TemplateField HeaderText="Name" HeaderStyle-Width="10%" ItemStyle-Width="10%">
                <ItemTemplate>
                    <%#Eval("name") %>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="City" HeaderStyle-Width="10%" ItemStyle-Width="10%">
                <ItemTemplate>
                    <%#Eval("city") %>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Reason" HeaderStyle-Width="25%" ItemStyle-Width="25%">
                 <ItemTemplate>
                    <%#Eval("reson") %>
                 </ItemTemplate>
             </asp:TemplateField>
             <asp:TemplateField HeaderText="Agent" HeaderStyle-Width="10%" ItemStyle-Width="10%">
                 <ItemTemplate>
                     <%#Eval("Agent") %>
                 </ItemTemplate>
             </asp:TemplateField>
             <asp:TemplateField HeaderText="Date" HeaderStyle-Width="10%" ItemStyle-Width="10%">
                 <ItemTemplate>
                   <%#Eval("date","{0:dd-MMM-yy}") %>
                 </ItemTemplate>
              </asp:TemplateField>
              <asp:TemplateField HeaderText="DList" HeaderStyle-Width="10%" ItemStyle-Width="10%">
                  <ItemTemplate>
                      <%#Eval("service") %>
                  </ItemTemplate>
              </asp:TemplateField>
              <asp:TemplateField HeaderText="EndDate" HeaderStyle-Width="10%" ItemStyle-Width="10%">
                  <ItemTemplate>
                      <%#Eval("endDate","{0:dd-MMM-yy}") %>
                  </ItemTemplate>
              </asp:TemplateField>
              <asp:TemplateField HeaderStyle-Width="5%" ItemStyle-Width="5%">
                  <ItemTemplate>
                       <asp:CheckBox data-needed='<%#Eval("userId") %>' ID="chkChecked" runat="server" />
                   </ItemTemplate>
               </asp:TemplateField>
             </Columns>
          </asp:GridView>

There are two steps:

1. You must set an appropriate width for GridView like this: Width="2000px".
2. You can set width of Colum by setting [ItemStyle-Width] Like this: ItemStyle-Width="300px".

** You can set width by setting fixed Pixels like "150 px" or by percentage like"10%".

<asp:BoundField DataField="ElementName" HeaderText="RBI GL Name" ItemStyle-Horizontal ItemStyle-Width="50px" HeaderStyle-Width="50px"/>