错误 3 当前上下文中不存在名称“printPreviewDialog1”
错误 3 当前上下文中不存在名称“printPreviewDialog1” --------------------编程问答-------------------- printPreviewDialog1 没定义 --------------------编程问答--------------------private void 打印ToolStripMenuItem_Click(object sender, EventArgs e)
{
//开始打印
printDocument1.Print();
}
void printdoc_PrintPage(object sender, PrintPageEventArgs e)
{
int y = 0;
//设置字体
Font f = new Font("宋体", 20);
//控制打印是什么内容 label1.text是打印内容 f是字体对象 brushes是填充颜色 10,10是打印到纸上的起始坐标
for (; index < dt.Rows.Count; index++)
{
y += 100;
if (y >= e.PageBounds.Height - 100)
{
y = 0;
e.HasMorePages = true;
index++;
return;
}
e.Graphics.DrawString(dt.Rows[index][0].ToString(), f, Brushes.Black, 300, y);
e.Graphics.DrawString(dt.Rows[index][1].ToString(), f, Brushes.Black, 400, y);
e.Graphics.DrawString(dt.Rows[index][2].ToString(), f, Brushes.Black, 500, y);
}
e.HasMorePages = false;
}
private void 预览ToolStripMenuItem_Click(object sender, EventArgs e)
{
printPreviewDialog1.Document = printDocument1;
if (printPreviewDialog1.ShowDialog() == DialogResult.OK)
printDocument1.Print();
}
private void Form1_Load(object sender, EventArgs e)
{
SqlDataAdapter sda = new SqlDataAdapter();
sda.SelectCommand = new SqlCommand("select * from ghlb", new SqlConnection(sql.getCon()));
dt = new DataTable();
sda.Fill(dt);
dataGridView1.DataSource = dt;
printDocument1.PrintPage += new PrintPageEventHandler(printdoc_PrintPage);
} --------------------编程问答-------------------- --------------------编程问答-------------------- printPreviewDialog1 这个呢？
--------------------编程问答-------------------- 错误 1 未能找到类型或命名空间名称“printPreviewDialog”(是否缺少 using 指令或程序集引用?) d:\我的文档\visual studio 2010\Projects\ghlbapgl\ghlbapgl\Form1.cs 46 17 GHLB
--------------------编程问答-------------------- PrintPreviewDialog printPreviewDialog1 = new PrintPreviewDialog(); --------------------编程问答--------------------
就是这样的，需要初始化一下才可以啊 --------------------编程问答--------------------
private void button1_Click(object sender, EventArgs e)
{
try
{
RefreshData();
}
catch (Exception ex)
{
sql.cn.Close();
MessageBox.Show(ex.Message);
}
}
错误 1 当前上下文中不存在名称“sql” D:\我的文档\Visual Studio 2010\Projects\ghlbapgl\ghlbapgl\Form1.cs 89 88 GHLB
--------------------编程问答-------------------- 缺什么你定义什么啊。
你的文件哪来的？缺这么多东西？ --------------------编程问答--------------------
void RefreshData()
{
string sqlStr;
//DataSet ds = new DataSet();
sqlStr = "select * from ghlb";
ds = SQL.GetDataFromDB(sqlStr);
if (ds != null)
{
dataGridView1.DataSource = ds.Tables[0];
dataGridView1.Columns[1].HeaderText = "号别ID";
dataGridView1.Columns[1].Width = 85;
dataGridView1.Columns[2].HeaderText = "号类";
dataGridView1.Columns[2].Width = 100;
dataGridView1.Columns[3].HeaderText = "科室";
dataGridView1.Columns[3].Width = 100;
dataGridView1.Columns[4].HeaderText = "名称";
dataGridView1.Columns[4].Width = 100;
dataGridView1.Columns[5].HeaderText = "价格";
dataGridView1.Columns[5].Width = 85;
dataGridView1.Columns[6].HeaderText = "简码";
dataGridView1.Columns[6].Width = 100;
dataGridView1.Columns[7].HeaderText = "急诊标记";
dataGridView1.Columns[7].Width = 100;
dataGridView1.Columns[8].HeaderText = "说明";
dataGridView1.Columns[8].Width = 100;
}
else
{
dataGridView1.DataSource = null;
}
}
private void button7_Click(object sender, EventArgs e)
{
try
{
RefreshData();
}
catch (Exception ex)
{
SQL.cn.Close();
MessageBox.Show(ex.Message);
}
}
这个我是想实现全显的功能的，结果，我发现显示在datagridview中的数据错位了。是另外独立的几个列
例如，他们应该是对应的啊，可是效果却没有对应，一时间没有发现问题所在
补充：.NET技术 , C#
