在GridView的复选框，设置基于数据表值 [英] set checkbox in gridview based on datatable value

问题描述

我有一个复选框字段和几个绑定字段GridView控件。复选框域不直接映射到数据库中的一个字段。 。相反，我希望在数据库中读取一个字段的值，检查一些复选框

I have a gridview control with a checkbox field and several bound fields. The checkbox field does not directly map to a field in the database. Rather, i want to read a value from a field in the database and "check" some of the checkboxes.

例如，由于从数据库以下数据 - >数据表

For example, given the following data from the database -> datatable

        PROCESSED   NAME             DATE            
            Y       Mickey Mouse     11/15/2011
            N       Donald Duck      4/01/2012
            Y       James Bond       5/02/2011

我想在GridView显示一个复选框，并提示框的值设置为UNCHECKED，其中PROCESSED = N和对加工= Y要么有一个不可编辑的复选框或没有复选框都没有。

I would like the gridview to display a checkbox and set the value of boxes to UNCHECKED where PROCESSED = N and for PROCESSED = Y either have an uneditable checkbox or no checkbox at all.

        PROCESSED   NAME             DATE            
           [/]       Mickey Mouse     11/15/2011
           [ ]       Donald Duck      4/01/2012
           [/]       James Bond       5/02/2011

要填充的GridView，一个SQL语句是对数据库运行，以及SQL查询的结果存储在一个DataTable。之前的数据表绑定到GridView，我想检查处理区域，并设置基于该值的复选框。

To populate the gridview, a SQL stmt is run against a database, and the result of the SQL query is stored in a datatable. Before binding the datatable to the gridview, i would like to check the "processed" field and set the checkbox based on that value.

下面是GridView控件（缩短清晰度）：

Here is the gridview control (shortened for clarity):

<asp:GridView ID="gridview_all_applicants" runat="server" AllowPaging="True">
        <Columns>
          <asp:TemplateField HeaderText="Complete">
                <ItemTemplate>
                    <asp:CheckBox ID="process_flag" runat="server" />
                </ItemTemplate>
          </asp:TemplateField>
          <asp:BoundField DataField="lastname" HeaderText="Last Name" ReadOnly="True"  SortExpression="lastname" />

下面是我有这么远远落后于

Here is what i have so far in the code behind

 SqlCommand cmd = new SqlCommand(sql query here);
 SqlDataAdapter da = new SqlDataAdapter();
 DataTable dt = new DataTable();
 da.SelectCommand = cmd;
 // Save results of select statement into a datatable
 da.Fill(dt);
 foreach (DataRow r in dt.Rows)
 {
        // do some processing of data returned from query
        // read the char value from the returned data and set checkbox

             procflag = r["process_flag"].ToString().ToLower();
             CheckBox chkbox = new CheckBox();
             if (procflag == null || procflag == "n")
             {
                // SET CHECKBOX TO "NOT CHECKED"        

              }
              else
              {
                 // SET CHECKBOX TO "CHECKED" AND MAKE IT UNCLICKABLE
                 // ----OR---- DO NOT DISPLAY CHECKBOX AT ALL.

               }
     } // end for each


          gridview_all_applicants.DataSource = dt;
          gridview_all_applicants.DataBind(); 

任何帮助是极大的赞赏。

any help is greatly appreciated.

推荐答案

您可以做到这一点是这样的：

You can do it like this:

首先在SQL Server：

First in sql server:

SELECT 
    CAST(CASE PROCESSED WHEN 'Y' THEN 1 ELSE 0 END AS BIT) AS PROCESSED
    NAME
    DATE
FROM ExampleTable

在C＃代码：

SqlCommand cmd = new SqlCommand(sql query here); 
SqlDataAdapter da = new SqlDataAdapter(); 
DataTable dt = new DataTable(); 
da.SelectCommand = cmd; 

// Save results of select statement into a datatable 
da.Fill(dt);

gridview_all_applicants.DataSource = dt;          
gridview_all_applicants.DataBind(); 

终于在ASPX：

and finally in aspx:

<asp:TemplateField HeaderText="Complete">
<ItemTemplate>
    <asp:CheckBox ID="process_flag" runat="server" Checked='<%# bool.Parse(Eval("PROCESSED").ToString()) %>' Enable='<%# !bool.Parse(Eval("PROCESSED").ToString()) %>'/>
</ItemTemplate>

这篇关于在GridView的复选框，设置基于数据表值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！