添加刪除每當新的記錄將被添加

在我的Windows窗體應用程序，我想補充Delete LinkLabel的針對每個數據行，我下面做的LinkLabel柱：添加刪除每當新的記錄將被添加

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
using System.Windows.Forms; 
using System.Data.SqlClient; 

namespace search 
{ 
    public partial class Form1 : Form 
    { 

     SqlConnection connection = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\Documents and Settings\\Musewerx\\My Documents\\Contacts.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"); 
     SqlDataAdapter da = new SqlDataAdapter(); 
     DataSet ds = new DataSet(); 
     public Form1() 
     { 
      InitializeComponent(); 
      bindDatagridview(); 
     } 
     public void bindDatagridview() 
     { 
      SqlDataAdapter da = new SqlDataAdapter(); 
      DataSet ds = new DataSet(); 
      da.SelectCommand = new SqlCommand("Select * from contactsinfo", connection); 
      da.Fill(ds); 

      dataGridView1.DataSource = ds.Tables[0]; 

      clear(); 
      DataGridViewLinkColumn dgvLink = new DataGridViewLinkColumn(); 
      dgvLink.UseColumnTextForLinkValue = true; 
      dgvLink.LinkBehavior = LinkBehavior.SystemDefault; 
      dgvLink.HeaderText = ""; 
      dgvLink.Name = "lnk_delete"; 
      dgvLink.LinkColor = Color.Blue; 
      dgvLink.TrackVisitedState = true; 
      dgvLink.Text = "Delete"; 
      dgvLink.UseColumnTextForLinkValue = true; 

      bool check = dataGridView1.Columns.Contains("dgvLink"); 
      if(check == false) 
      { 
       dataGridView1.Columns.Add(dgvLink); 
      } 
     } 

     public void clear() 
     { 
      textBox1.Text = string.Empty; 
      textBox2.Text = string.Empty; 
     } 

     private void button1_Click(object sender, EventArgs e) 
     { 
      if (textBox1.Text == string.Empty) 
      { 
       MessageBox.Show("Enter Contact Name"); 
      } 
      else if(textBox2.Text == string.Empty) 
      { 
       MessageBox.Show("Enter Contact Number"); 
      } 
      else 
      { 
      da.InsertCommand = new SqlCommand("Insert into contactsinfo(ContactName,ContactNumber) Values('" + textBox1.Text + "','" + textBox2.Text + "')", connection); 
      connection.Open(); 
      da.InsertCommand.ExecuteNonQuery(); 
      bindDatagridview(); 
      clear(); 
      connection.Close(); 
      } 
     } 

     private void button2_Click(object sender, EventArgs e) 
     { 
      Form2 f2 = new Form2(); 
      f2.Show(); 
      this.Hide(); 
     } 

     private void Form1_Load(object sender, EventArgs e) 
     { 

     } 
    } 
}

但問題是，每一次當我輸入新記錄新列Delete linklabel將被添加，並且我只想要一次添加一個Delete linklabel列。

好心建議我，等待您的回覆。謝謝。

來源

2014-05-12 user88

只是把一個if條件來檢查列已經存在。如果不存在，則添加。否則不要添加。 – ray

@ray：根據您的建議，我編輯了我的帖子，但仍然無法正常工作。 – user88

試試這個

將「dgvLink」更改爲「lnk_delete」。「lnk_delete」是列名稱。

DataGridViewLinkColumn dgvLink = new DataGridViewLinkColumn(); 
dgvLink.UseColumnTextForLinkValue = true; 
dgvLink.LinkBehavior = LinkBehavior.SystemDefault; 
dgvLink.HeaderText = ""; 
dgvLink.Name = "lnk_delete"; 
dgvLink.LinkColor = Color.Blue; 
dgvLink.TrackVisitedState = true; 
dgvLink.Text = "Delete"; 
dgvLink.UseColumnTextForLinkValue = true; 

    bool check = dataGridView1.Columns.Contains("lnk_delete"); 
    if (check == false) 
    { 
    dataGridView1.Columns.Add(dgvLink); 
    }

來源

2014-05-12 10:11:47 Sathish

添加刪除每當新的記錄將被添加

回答

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