我有一个小问题,不知道它是什么
我正在尝试以下查询将数据从我的datagridview插入到我的数据库中 问题是当我执行查询时它会给我以下错误
','附近的语法不正确。
但是数据已成功插入数据库中。我试图在这里找到答案,但无济于事。有人请指出错误。
我的代码:
private void button2_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(@"Data Source HERE");
conn.Open();
int rn = 0;
while (rn < dgvmain.Rows.Count)
{
SqlCommand cmd = new SqlCommand("Insert into mainTab(Token_number,ItemType,Quantity,Amount) values(" + dgvmain.Rows[rn].Cells[0].Value + ",'" + dgvmain.Rows[rn].Cells[1].Value + "'," + dgvmain.Rows[rn].Cells[2].Value + "," + dgvmain.Rows[rn].Cells[3].Value + ")", conn);
cmd.ExecuteNonQuery();
rn++;
}
}
答案 0 :(得分:2)
尝试这样的事情:
private void button2_Click(object sender, EventArgs e)
{
// put your SqlConnection into a using block
using (SqlConnection conn = new SqlConnection(@"Data Source HERE"))
{
// define query with parameters
string queryStmt = "INSERT INTO dbo.mainTab(Token_number, ItemType, Quantity, Amount) " +
"VALUES(@TokenNumber, @ItemType, @Quantity, @Amount)";
// put your SqlCommand into a using block
using (SqlCommand cmd = new SqlCommand(queryStmt, conn))
{
// Add parameter definitions to SqlCommand
cmd.Parameters.Add("@TokenNumber", SqlDbType.Int);
cmd.Parameters.Add("@ItemType", SqlDbType.Int);
cmd.Parameters.Add("@Quantity", SqlDbType.Decimal);
cmd.Parameters.Add("@Amount", SqlDbType.Decimal);
int rn = 0;
// now open - as late as possible!
conn.Open();
// iterate
while (rn < dgvmain.Rows.Count)
{
// set parameter values
cmd.Parameters["@TokenNumber"].Value = Convert.ToInt32(dgvmain.Rows[rn].Cells[0].Value);
cmd.Parameters["@ItemType"].Value = Convert.ToInt32(dgvmain.Rows[rn].Cells[1].Value);
cmd.Parameters["@Quantity"].Value = Convert.ToDecimal(dgvmain.Rows[rn].Cells[2].Value);
cmd.Parameters["@Amount"].Value = Convert.ToDecimal(dgvmain.Rows[rn].Cells[3].Value);
// execute INSERT statement
cmd.ExecuteNonQuery();
rn++;
}
conn.Close();
}
}
}
答案 1 :(得分:1)
这是错的。请改变它:
while (rn < dgvmain.Rows.Count)
{
SqlCommand cmd = new SqlCommand("Insert into mainTab(Token_number,ItemType,Quantity,Amount) values(@tok,@itm,@qua,@amo)", conn);
cmd.Parameters.AddWithValue("@tok", dgvmain.Rows[rn].Cells[0].Value);
cmd.Parameters.AddWithValue("@itm", dgvmain.Rows[rn].Cells[1].Value);
cmd.Parameters.AddWithValue("@qua", dgvmain.Rows[rn].Cells[2].Value);
cmd.Parameters.AddWithValue("@amo", dgvmain.Rows[rn].Cells[3].Value);
cmd.ExecuteNonQuery();
rn++;
}