我无法将数据导入我的dataGridView

I ran the SQL Query in SQL Server Management Studio and it worked.

我在SQL Server Management Studio中运行SQL查询并且它有效。

Here is my code

这是我的代码

    private void buttonRunQuery_Click(object sender, EventArgs e)
     {
         if (connection == null)
         {
             connection = ConnectionStateToSQLServer();
             SqlCommand command = new SqlCommand(null, connection);
             command = createSQLQuery(command);
             dataGridView1.DataSource = GetData(command);
         }
         else
         {
             SqlCommand command = new SqlCommand(null, connection);
             command = createSQLQuery(command);
             dataGridView1.DataSource = GetData(command);
         }
     }

    private SqlCommand createSQLQuery(SqlCommand command)
     {
         string[] allTheseWords;
         if (textBoxAllTheseWords.Text.Length > 0)
         {
             allTheseWords = textBoxAllTheseWords.Text.Split(' ');
             string SQLQuery = "SELECT distinct [database].[dbo].[customerTable].[name], [database].[dbo].[customerTable].[dos], [database].[dbo].[customerTable].[accountID], [database].[dbo].[reportTable].[customerID], [database].[dbo].[reportTable].[accountID], [database].[dbo].[reportTable].[fullreport] FROM [database].[dbo].[reportTable], [database].[dbo].[customerTable] WHERE ";
             int i = 1;
             foreach (string word in allTheseWords)
             {
                 var name = "@word" + (i++).ToString();
                 command.Parameters.AddWithValue(name, "'%" + word "%'");
                 SQLQuery = SQLQuery + String.Format(" [database].[dbo].[reportTable].[fullreport] LIKE {0} AND ", name);
             }
             SQLQuery = SQLQuery + " [database].[dbo].[customerTable].[accountID] = [database].[dbo].[reportTable].[accountID]";
             command.CommandText = SQLQuery;
         }
         MessageBox.Show(command.CommandText.ToString());
         return command;
     }

    public DataTable GetData(SqlCommand cmd)
     {
         //SqlConnection con = new SqlConnection(connString);
         //SqlCommand cmd = new SqlCommand(sqlcmdString, cn);
         SqlDataAdapter da = new SqlDataAdapter(cmd);
         connection.Open();
         DataTable dt = new DataTable();
         da.Fill(dt);
         connection.Close();
         return dt;
     }

No error is given by VS2012 and no data is presented in my DataGridView

VS2012没有给出错误，我的DataGridView中没有数据显示

Any suggestions?

有什么建议么？

I saw this website and it didn't really help

我看到这个网站并没有真正帮助

http://bytes.com/topic/c-sharp/answers/530616-datagridview-combobox-column-databound-item-list

I am using an SQL Server 2012

我正在使用SQL Server 2012

The updated Query brings 1 single result in the SQL Server Management Studio (which is expected). The same query does not produce any rows in my datagrid.

更新的Query在SQL Server Management Studio中提供了1个单一结果（这是预期的）。相同的查询不会在我的数据网格中生成任何行。

I can't figure out whats going on? Do I need to bind anything using the GUI for VS2012?

我无法弄清楚最近发生了什么？我是否需要使用VS2012的GUI绑定任何内容？

2 个解决方案

#1

I notice you're doing a LIKE search, but when you're adding your parameters, you're not using "%". Try adding this:

我注意到你正在进行LIKE搜索，但是当你添加参数时，你没有使用“％”。尝试添加此：

command.Parameters.AddWithValue(name, "%" + word +"%");

Hope this helps.

希望这可以帮助。

BTW -- The DataBind method is not used in win forms for gridviews, just in web forms.

BTW - DataBind方法不用于网格视图的获胜形式，仅用于网络表单。

Good luck.

祝你好运。

#2

You should call method DataBind() on your DataGrid to actually bind data from the data source to the grid.

您应该在DataGrid上调用方法DataBind（）以实际将数据源中的数据绑定到网格。

dataGridView1.DataBind();

#1