C# comboBOX 单击事件 求助!
stringsql_str="select号码from表名groupby号码orderby号码";DataSetx3=newDataSet();OleDbDataAdap...
string sql_str = "select 号码 from 表名 group by号码 order by 号码";
DataSet x3 = new DataSet();
OleDbDataAdapter da3 = new OleDbDataAdapter(sql_str, conn);
da3.Fill(x3, "x3");
if (x3.Tables[0].Rows.Count > 0)
{
for (int i = 0; i < x3.Tables[0].Rows.Count; i++)
{
comboBox4.Items.Add(x3.Tables[0].Rows[i][0]);
}
}
用话comboBox4_MouseClick 这个事件的,每点击一次都会重复出现,要怎么修改啊? 展开
DataSet x3 = new DataSet();
OleDbDataAdapter da3 = new OleDbDataAdapter(sql_str, conn);
da3.Fill(x3, "x3");
if (x3.Tables[0].Rows.Count > 0)
{
for (int i = 0; i < x3.Tables[0].Rows.Count; i++)
{
comboBox4.Items.Add(x3.Tables[0].Rows[i][0]);
}
}
用话comboBox4_MouseClick 这个事件的,每点击一次都会重复出现,要怎么修改啊? 展开
1个回答
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