asp.net Gridview来自代码隐藏的布尔列 [英] asp.net Gridview Boolean column from code-behind

问题描述

我使用具有布尔字段的相同数据表将其绑定到2个不同的网格视图。一个gridview是在aspx文件中设计的，布尔字段有一个模板列

< asp：TemplateField>

< itemtemplate>

< asp：CheckBox ID =cbrunat =serverWidth =100px

Checked ='<％＃Convert.ToBoolean（Eval（boolField））％>' />



< itemstyle horizo​​ntalalign =中心>



此工作正常

但第二个网格是在后面的代码中构建的



gr2.Columns.Clear（）;


i i = 0; i< dt.Rows.Count; i ++）

{

BoundField dF = new BoundField（）; < br $>


dF.DataField = dt.Rows [i] .ItemArray [0] .ToString（）;

dF.HeaderText = dt.Rows [i] .ItemArray [1] .ToString（）;



gr2.Columns.Add（dF）;

}



gr2.DataSource = dt;

gr2.DataBind（）;



this也有效，但显示s bool列值为True / False。

我要显示是/否或复选框。我知道如何通过后面的代码中的ItemTemplate实现Checkbox，但无法弄清楚如何填充复选框，换句话说如何完成Checked ='<％＃Convert.ToBoolean（Eval（boolField））％> ;'在后面的代码中。

解决方案

为了通过代码隐藏实现它，请找到以下步骤：



Step1 ：在griview中添加OnRowDataBound属性。

 <  < span class =code-leadattribute> asp：gridview     id   =  GridView1    runat   =  server    autogeneratecolumns   =  False    onrowdatabound   =  GridView1_RowDataBound    cellpadding   =  4    forecolor   = ＃333333    gridlines   = 无    xmlns：asp   = ＃unknown >  
 <  列 >  
 <   asp：boundfield     datafield   =  UserId    headertext   = 用户ID    /  >  
 <   asp：templatefield     headertext   = 选择 >  
 <   itemtemplate  >  
 <   asp：checkbox     id   =  chkSelect    runat   =  server    /  >  
 <   / itemtemplate  >  
 <   / asp：templatefield  >  <   / columns  >  
 <   / asp：gridview  >  

Step2 ：添加OnRowDataBound方法代码背后。

 受保护  void  GridView1_RowDataBound（ object  sender，GridViewRowEventArgs e）
 {
  //  检查行类型，该行类型应为数据行 
  if （e.Row.RowType == DataControlRowType .DataRow）
 {
  //  找到复选框并从数据源中分配值 
（（CheckBox）e.Row.FindControl（  chkSelect） ）.Checked = Convert.ToBoolean（（（DataRowView）e.Row.DataItem）[ 1 ]）; 
} 
} 

http://www.c-sharpcorner.com/uploadfile/MohanKumar.R/selecting-checkboxes-inside-the-gridview-control/ [ ^ ]

I using the same datatable that has a Boolean field to bind it to 2 different gridviews. One gridview is designed in aspx file and there is a template column for Boolean field
<asp:TemplateField>
<itemtemplate>
<asp:CheckBox ID="cb" runat="server" Width="100px"
Checked='<%# Convert.ToBoolean(Eval("boolField")) %>' />

<itemstyle horizontalalign="Center">

this works fine
but the second grid is built in the code behind

gr2.Columns.Clear();

for (int i = 0; i < dt.Rows.Count; i++)
{
BoundField dF = new BoundField();

dF.DataField = dt.Rows[i].ItemArray[0].ToString();
dF.HeaderText = dt.Rows[i].ItemArray[1].ToString();

gr2.Columns.Add(dF);
}

gr2.DataSource = dt;
gr2.DataBind();

this also works but shows bool column values as True/False.
I'd like it either to display Yes/No or check boxes. I know how to implement Checkbox via ItemTemplate in the code behind but can't figure out how to populate check boxes, in other words how to accomplish Checked='<%# Convert.ToBoolean(Eval("boolField")) %>' in the code behind.

解决方案

In order to implement it through codebehind please find below steps:

Step1: Add OnRowDataBound property in griview.

<asp:gridview id="GridView1" runat="server" autogeneratecolumns="False" onrowdatabound="GridView1_RowDataBound" cellpadding="4" forecolor="#333333" gridlines="None" xmlns:asp="#unknown">
	<columns>
		<asp:boundfield datafield="UserId" headertext="User Id" />
		<asp:templatefield headertext="Select">
		<itemtemplate>
			<asp:checkbox id="chkSelect" runat="server" />
		</itemtemplate>
	</asp:templatefield></columns>
</asp:gridview>

Step2: Add OnRowDataBound method in code behind.

 protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
        //Check for the row type, which should be data row
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            //Find the check boxes and assign the values from the data source
            ((CheckBox)e.Row.FindControl("chkSelect")).Checked = Convert.ToBoolean(((DataRowView)e.Row.DataItem)[1]);
        }
}

http://www.c-sharpcorner.com/uploadfile/MohanKumar.R/selecting-checkboxes-inside-the-gridview-control/[^]

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