C#中DataGridView的使用 [C# .NET]

在C#中,使用DataGridView控件能很方便的显示从数据库中检索的数据.

1.首先，连接数据库

public void Connect()
  {
    string strConn = string.Format("Data Source = IP;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=DataBaseName;User ID = UserID;");
    using (sqlConnection cnn = new SqlConnection(strConn))
    {
    try
    {
      cnn.Open();
      bConn = true;
    }
    catch (Exception exp)
    {
      MessageBox.Show(exp.Message);
      bConn = false;
    }
    }
  }

2.构造SQL语句去数据库查询,并奖结果放到DataGridView控件

string strSql = string.Format("select * from TableName where ID < 50 order by ID");
    DataSet dataset = new DataSet();
    SqlDataAdapter myDataAdapter = new SqlDataAdapter(strSql, cnn);
    myDataAdapter.Fill(dataset);   //这句跟下面的顺序不能颠倒
    dataGridView1.DataSource = dataset.Tables[0];//填充

3.添加DataGridView控件的右键菜单

//在CellMouseClick里操作
private void DataGridView_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
  {
    if (e.Button == MouseButtons.Right)
    {
      if (e.RowIndex >= 0)
      {
        dataGridView1.ClearSelection();
        dataGridView1.Rows[e.RowIndex].Selected = true; //选中
        dataGridView1.CurrentCell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];//选中单元
        DataGridRightMenu.Show(MousePosition.X, MousePosition.Y); //在点击处显示右键菜单
      }
    }
  }

4.对DataGridView的样式进行设置

//设置可以根据自己需要来进行
//设置列宽
    dataGridView1.Columns[0].FillWeight = 8;
    dataGridView1.Columns[1].FillWeight = 15;
    dataGridView1.Columns[2].FillWeight = 15;
    dataGridView1.Columns[3].FillWeight = 8;
    dataGridView1.Columns[4].FillWeight = 50;
    dataGridView1.Columns[5].FillWeight = 4;
    //设置标题文字
    dataGridView1.Columns[0].HeaderText = "A";
    dataGridView1.Columns[1].HeaderText = "B";
    dataGridView1.Columns[2].HeaderText = "C";
    dataGridView1.Columns[3].HeaderText = "D";
    dataGridView1.Columns[4].HeaderText = "E";
    dataGridView1.Columns[5].HeaderText = "F";

5.设置显示时候相隔颜色

//颜色设置,相隔行颜色不同
public void SetDataGridColor(int nCount)
  {
    for (int i = 0; i < this.dataGridView1.Rows.Count; )
    {
      this.dataGridView1.Rows[i].DefaultCellStyle.BackColor = System.Drawing.Color.LightGray;
      i += 2;
    }
  }