try
{
//將新用戶信息插入數據庫
string strsql = "insert into httang_test.test(id,name,password,adress) values('" + this.IdTextBox.Text + "','" + this.NameTextBox.Text + "','" + this.PassWordTextBox.Text + "','" + this.AdressTextBox.Text + "');";
DataTable dt = MySqlHelper.QueryDataTable(strsql);

}
catch (Exception ex)
{

MessageBox.Show(ex.Message);
}
//成功提示，跳轉
MessageBox.Show("新用戶添加成功！");
information infor = new information();
infor.ShowDialog();

--------------------------------------------------------------------------------------------------------------------------------------------

//定義管理員帳戶密碼
string user = "whx";
int pass = 1111;
//條件判斷
if (user == this.UserTextBox.Text && pass == Convert.ToInt32(this.PassTextBox.Text))
{
//符合條件，跳轉新用戶添加
register re = new register();
re.ShowDialog();
}
else {
//錯誤提示
MessageBox.Show("請輸入正確的管理員帳號");
}

-----------------------------------------------------------------------------------------------------------------------------------------------------------

//用戶信息查詢

try
{
//查詢所有信息列表
string strSql = "select * from httang_test.test ";
DataTable dt = MySqlHelper.QueryDataTable(strSql);
dataGridView1.DataSource = dt;
dataGridView1.AutoResizeColumns();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);

}

---------------------------------------------------------------------------------------------------------------------------------------------------------------

//用戶信息修改
try
{
//根據輸入信息，更新用戶信息
string strsql = "update httang_test.test set id='" + this.textBox1.Text + "', name='" + this.textBox2.Text + "', password='" + this.textBox3.Text + "', adress='" + this.textBox4.Text + "' where id='" + this.textBox1.Text + "';";

DataTable dt = MySqlHelper.QueryDataTable(strsql);

dataGridView1.DataSource = dt;

dataGridView1.AutoResizeColumns();

}
catch (Exception ex)
{
MessageBox.Show(ex.Message);

}

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

//用戶信息刪除
try
{
//根據輸入的ID，刪除該行用戶信息
string strsql = "delete from httang_test.test where id ='" + this.deletebox.Text + "';";

DataTable dt = MySqlHelper.QueryDataTable(strsql);
dataGridView1.DataSource = dt;
dataGridView1.AutoResizeColumns();
}
catch (Exception ex)
{

MessageBox.Show(ex.Message);
}

轉載于:https://www.cnblogs.com/wanghx-0713/p/7878917.html

《新程序員》：云原生和全面數字化實踐50位技術專家共同創作，文字、視頻、音頻交互閱讀

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