如何使用ASP.NET仅检查gridview中的一个复选框 [英] How to check only one check box in gridview using ASP.NET

问题描述

  protected   void  btnView_Click（对象发​​件人，EventArgs e）
 {
  foreach （GridViewRow行 in  GridLeaveApproved.Rows）
 {
 CheckBox ch =（CheckBox）row.FindControl（  CheckBox1）; 
  if （ch.Checked）
 {
  //  < span class =code-comment>标签lblleaveid =（标签）row.FindControl（lblLid）;  
  //   int lid = Convert.ToInt32（lblleaveid.Text）;  
  //  标签lbllid =（标签）row.FindControl（lblLId）;  
  //   int lid = Convert.ToInt32（lbllid.Text）;  
 Label lblEid =（Label）row.FindControl（  lblEmpId）; 
  string  eid = lblEid.Text; 
 cmd =  new  MySqlCommand（ 选择*来自empleaves，其中EmpId = @ eid，conn）; 
 cmd.Parameters.AddWithValue（  @ eid，eid）; 
 MySqlDataAdapter da =  new  MySqlDataAdapter（cmd）; 
 DataSet ds =  new  DataSet（）; 
 da.Fill（ds，  newleave）; 
 GridLeavesView.DataSource = ds.Tables [  newleave]; 
 GridLeavesView.DataBind（）; 
} 
} 
 GridLeavesView.Visible =  true ; 
} 

i只想查看一个复选框。我正在尝试选择两个复选框，在单击查看按钮后显示错误消息（仅选择一个复选框）。





请帮助我朋友..



我尝试了什么：



protected void btnView_Click （对象发送者，EventArgs e）

{

foreach（GridLeaveApproved.Rows中的GridViewRow行）

{

CheckBox ch =（CheckBox）row.FindControl（CheckBox1）;

if（ch.Checked）

{

// Label lblleaveid =（标签）row.FindControl（lblLid）;

// int lid = Convert.ToInt32（lblleaveid.Text）;

//标签lbllid =（标签）row.FindControl（lblLId）;

// int lid = Convert.ToInt32（lbllid.Text）;

Label lblEid =（Label）row.FindControl（ lblEmpId）;

string eid = lblEid.Text;

cmd = new MySqlCommand（select * from empleaves，其中EmpId = @ eid，conn）;

cmd.Parameters.AddWithValue（ @eid，eid）;

MySqlDataAdapter da = new MySqlDataAdapter（cmd）;

DataSet ds = new DataSet（）;

da。填充（ds，newleave）;

GridLeavesView.DataSource = ds.Tables [newleave];

GridLeavesView.DataBind（）;

}

}

GridLeavesView.Visible = true;

}

解决方案

< blockquote>由于你已经标记了Asp.net和C＃，我使用c＃给你解决方案。

我希望你有一个标签来显示错误信息。

 受保护  void  btnView_Click（ object  sender，EventArgs e）
 {
 lblMessage.Text =   ; 
  int  count =  0 ; 
  foreach （GridViewRow行  GridLeaveApproved.Rows）
 {
 CheckBox ch =（CheckBox）row.FindControl（  CheckBox1）; 
  if （ch.Checked）
 {
 count ++; 
  if （count >   1 ）
 {
 lblMessage.Text =  请只选择一行; 
  return ; 
} 
} 
} 
 
  foreach （GridViewRow行 in  GridLeaveApproved.Rows）
 {
 CheckBox ch =（CheckBox）row.FindControl（  CheckBox1）; 
  if （ch.Checked）
 {
  //  < span class =code-comment>标签lblleaveid =（标签）row.FindControl（lblLid）;  
  //   int lid = Convert.ToInt32（lblleaveid.Text）;  
  //  标签lbllid =（标签）row.FindControl（lblLId）;  
  //   int lid = Convert.ToInt32（lbllid.Text）;  
 Label lblEid =（Label）row.FindControl（  lblEmpId）; 
  string  eid = lblEid.Text; 
 cmd =  new  MySqlCommand（ 选择*来自empleaves，其中EmpId = @ eid，conn）; 
 cmd.Parameters.AddWithValue（  @ eid，eid）; 
 MySqlDataAdapter da =  new  MySqlDataAdapter（cmd）; 
 DataSet ds =  new  DataSet（）; 
 da.Fill（ds，  newleave）; 
 GridLeavesView.DataSource = ds.Tables [  newleave]; 
 GridLeavesView.DataBind（）; 
} 
} 
 GridLeavesView.Visible =  true ; 
 
 
} 

你也可以这样做..

  foreach （DataGridViewRow行  GridLeaveApproved.Rows） 
 {
 DataGridViewCheckBoxCell ch =（DataGridViewCheckBoxCell）row.Cells [ 1 ]; 
  if （ch.Selected ==  true ）
 {
  //  执行代码检查 
} 
  else  
 {
  //  如果未检查则执行代码 
} 
} 

protected void btnView_Click(object sender, EventArgs e)
        {
            foreach (GridViewRow row in GridLeaveApproved.Rows)
            {
                CheckBox ch = (CheckBox)row.FindControl("CheckBox1");
                if (ch.Checked)
                {
                    //Label lblleaveid = (Label)row.FindControl("lblLid");
                    //int lid = Convert.ToInt32(lblleaveid.Text);
                    //Label lbllid = (Label)row.FindControl("lblLId");
                    //int lid = Convert.ToInt32(lbllid.Text);
                    Label lblEid = (Label)row.FindControl("lblEmpId");
                    string eid = lblEid.Text;
                    cmd = new MySqlCommand("Select * from empleaves where EmpId=@eid ", conn);
                    cmd.Parameters.AddWithValue("@eid", eid);
                    MySqlDataAdapter da = new MySqlDataAdapter(cmd);
                    DataSet ds = new DataSet();
                    da.Fill(ds, "newleave");
                    GridLeavesView.DataSource = ds.Tables["newleave"];
                    GridLeavesView.DataBind();
                }
            }
            GridLeavesView.Visible = true;
        }

i want to check only one checkbox. i am trying to select two checkboxes show error message like(only select one checkbox) when after clicking View Button.


please help me friends..

What I have tried:

protected void btnView_Click(object sender, EventArgs e)
{
foreach (GridViewRow row in GridLeaveApproved.Rows)
{
CheckBox ch = (CheckBox)row.FindControl("CheckBox1");
if (ch.Checked)
{
//Label lblleaveid = (Label)row.FindControl("lblLid");
//int lid = Convert.ToInt32(lblleaveid.Text);
//Label lbllid = (Label)row.FindControl("lblLId");
//int lid = Convert.ToInt32(lbllid.Text);
Label lblEid = (Label)row.FindControl("lblEmpId");
string eid = lblEid.Text;
cmd = new MySqlCommand("Select * from empleaves where EmpId=@eid ", conn);
cmd.Parameters.AddWithValue("@eid", eid);
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "newleave");
GridLeavesView.DataSource = ds.Tables["newleave"];
GridLeavesView.DataBind();
}
}
GridLeavesView.Visible = true;
}

解决方案

Since you have tagged Asp.net and C#, i am giving you the solution using c#.
and i hope you will be having a label to display the error message.

protected void btnView_Click(object sender, EventArgs e)
       {
           lblMessage.Text = "";
           int count = 0;
           foreach (GridViewRow row in GridLeaveApproved.Rows)
           {
               CheckBox ch = (CheckBox)row.FindControl("CheckBox1");
               if (ch.Checked)
               {
                   count++;
                   if (count > 1)
                   {
                       lblMessage.Text = "Please select only one row";
                       return;
                   }
               }
           }

           foreach (GridViewRow row in GridLeaveApproved.Rows)
           {
               CheckBox ch = (CheckBox)row.FindControl("CheckBox1");
               if (ch.Checked)
               {
                   //Label lblleaveid = (Label)row.FindControl("lblLid");
                   //int lid = Convert.ToInt32(lblleaveid.Text);
                   //Label lbllid = (Label)row.FindControl("lblLId");
                   //int lid = Convert.ToInt32(lbllid.Text);
                   Label lblEid = (Label)row.FindControl("lblEmpId");
                   string eid = lblEid.Text;
                   cmd = new MySqlCommand("Select * from empleaves where EmpId=@eid ", conn);
                   cmd.Parameters.AddWithValue("@eid", eid);
                   MySqlDataAdapter da = new MySqlDataAdapter(cmd);
                   DataSet ds = new DataSet();
                   da.Fill(ds, "newleave");
                   GridLeavesView.DataSource = ds.Tables["newleave"];
                   GridLeavesView.DataBind();
               }
           }
           GridLeavesView.Visible = true;


       }

You can also perform like this..

foreach (DataGridViewRow row in GridLeaveApproved.Rows)
        {
            DataGridViewCheckBoxCell ch = (DataGridViewCheckBoxCell)row.Cells[1];
            if (ch.Selected == true)
            {
                //do code if it checked
            }
            else
            {
                //do code if it not checked
            }
        }

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